Wikipedia

List of interface bit rates

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This is a list of interface bit rates, is a measure of information transfer rates, or digital bandwidth capacity, at which digital interfaces in a computer or network can communicate over various kinds of buses and channels. The distinction can be arbitrary between a computer bus, often closer in space, and larger telecommunications networks. Many device interfaces or protocols (e.g., SATA, USB, SAS, PCIe) are used both inside many-device boxes, such as a PC, and one-device-boxes, such as a hard drive enclosure. Accordingly, this page lists both the internal ribbon and external communications cable standards together in one sortable table.

Factors limiting actual performance, criteria for real decisions

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Most of the listed rates are theoretical maximum throughput measures; in practice, the actual effective throughput is almost inevitably lower in proportion to the load from other devices (network/bus contention), physical or temporal distances, and other overhead in data link layer protocols etc. The maximum goodput (for example, the file transfer rate) may be even lower due to higher layer protocol overhead and data packet retransmissions caused by line noise or interference such as crosstalk, or lost packets in congested intermediate network nodes. All protocols lose something, and the more robust ones that deal resiliently with very many failure situations tend to lose more maximum throughput to get higher total long term rates.

Device interfaces where one bus transfers data via another will be limited to the throughput of the slowest interface, at best. For instance, SATA revision 3.0 (6 Gbit/s) controllers on one PCI Express 2.0 (5 Gbit/s) channel will be limited to the 5 Gbit/s rate and have to employ more channels to get around this problem. Early implementations of new protocols very often have this kind of problem. The physical phenomena on which the device relies (such as spinning platters in a hard drive) will also impose limits; for instance, no spinning platter shipping in 2009 saturates SATA revision 2.0 (3 Gbit/s), so moving from this 3 Gbit/s interface to USB 3.0 at 4.8 Gbit/s for one spinning drive will result in no increase in realized transfer rate.

Contention in a wireless or noisy spectrum, where the physical medium is entirely out of the control of those who specify the protocol, requires measures that also use up throughput. Wireless devices, BPL, and modems may produce a higher line rate or gross bit rate, due to error-correcting codes and other physical layer overhead. It is extremely common for throughput to be far less than half of theoretical maximum, though the more recent technologies (notably BPL) employ preemptive spectrum analysis to avoid this and so have much more potential to reach actual gigabit rates in practice than prior modems.

Another factor reducing throughput is deliberate policy decisions made by Internet service providers that are made for contractual, risk management, aggregation saturation, or marketing reasons. Examples are rate limiting, bandwidth throttling, and the assignment of IP addresses to groups. These practices tend to minimize the throughput available to every user, but maximize the number of users that can be supported on one backbone.

Furthermore, chips are often not available in order to implement the fastest rates. AMD, for instance, does not support the 32-bit HyperTransport interface on any CPU it has shipped as of the end of 2009. Additionally, WiMAX service providers in the US typically support only up to 4 Mbit/s as of the end of 2009.

Choosing service providers or interfaces based on theoretical maxima is unwise, especially for commercial needs. A good example is large scale data centers, which should be more concerned with price per port to support the interface, wattage and heat considerations, and total cost of the solution. Because some protocols such as SCSI and Ethernet now operate many orders of magnitude faster than when originally deployed, scalability of the interface is one major factor, as it prevents costly shifts to technologies that are not backward compatible. Underscoring this is the fact that these shifts often happen involuntarily or by surprise, especially when a vendor abandons support for a proprietary system.

Conventions

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By convention, bus and network data rates are denoted either in bits per second (bit/s) or bytes per second (B/s). In general, parallel interfaces are quoted in B/s and serial in bit/s. The more commonly used is shown below in bold type.

On devices like modems, bytes may be more than 8 bits long because they may be individually padded out with additional start and stop bits; the figures below will reflect this. Where channels use line codes (such as Ethernet, Serial ATA, and PCI Express), quoted rates are for the decoded signal.

The figures below are simplex data rates, which may conflict with the duplex rates vendors sometimes use in promotional materials. Where two values are listed, the first value is the downstream rate and the second value is the upstream rate.

The use of decimal prefixes is standard in data communications.

Bandwidths

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The figures below are grouped by network or bus type, then sorted within each group from lowest to highest bandwidth; gray shading indicates a lack of known implementations.

As stated above, all quoted bandwidths are for each direction. Therefore, for duplex interfaces (capable of simultaneous transmission both ways), the stated values are simplex (one way) speeds, rather than total upstream+downstream.

Radio clock

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Time signal station to radio clock

Technology Max. rate Year
IRIG and related 1 bit/s ~0.125 characters/s[1][2] 1960[citation needed]

Teletypewriter (TTY) or telecommunications device for the deaf (TDD)

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Technology Max. rate Year
TTY (V.18) 45.4545 bit/s 6 characters/s[3] 1994[4]
TTY (V.18) 50 bit/s 6.6 characters/s 1994
NTSC Line 21 Closed Captioning 1 kbit/s ~100 characters/s 1976[5]

Modems (narrowband and broadband)

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Narrowband (POTS: 4 kHz channel)

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Technology Rate Rate ex. overhead Year
Morse code (skilled operator) 0.021 kbit/s[a] 4 characters per second (cps) (~40 wpm)[b] 1844
Normal human speech 0.039 kbit/s[6] prehistoric
Teleprinter (50 baud) 0.05 kbit/s 404 operations per minute 1940x
Modem 110 baud (Bell 101) 0.11 kbit/s 0.010 kB/s (~10 cps)[c] 1959
Modem 300 (300 baud; Bell 103 or V.21) 0.3 kbit/s 0.03 kB/s (~30 cps)[c] 1962[7]
Modem 1200/75 (600 baud; V.23) 1.2/0.075 kbit/s 0.12/0.0075 kB/s (~120 cps)[c] 1964(?)[8]
Modem 1200 (600 baud; Vadic VA3400, Bell 212A, or V.22) 1.2 kbit/s 0.12 kB/s (~120 cps)[c] 1976
Modem 1200 (Bell 202C, 202D) 1.2 kbit/s 0.15 kB/s (~150 cps) ?
Modem 2000 (Bell 201A) 2 kbit/s 0.25 kB/s (~250 cps) ?
Modem 2400 (Bell 201B) 2.4 kbit/s 0.3 kB/s (~300 cps) ?
Modem 2400 (600 baud; V.22bis) 2.4 kbit/s 0.3 kB/s[c] 1984[8]
Modem 4800/75 (1600 baud; V.27ter) 4.8/0.075 kbit/s 0.6/0.0075 kB/s[c] 1976[8]
Modem 4800 (1600 baud, Bell 208A, 208B) 4.8 kbit/s 0.6 kB/s
Modem 9600 (2400 baud; V.32) 9.6 kbit/s 1.2 kB/s[c] 1984[8]
Modem 14.4 (2400 baud; V.32bis) 14.4 kbit/s 1.8 kB/s[c] 1991[7]
Modem 28.8 (3200 baud; V.34-1994) 28.8 kbit/s 3.6 kB/s[c] 1994
Modem 33.6 (3429 baud; V.34-1996/98) 33.6 kbit/s 4.2 kB/s[c] 1996[8]
Modem 56k (8000/3429 baud; V.90) 56.0/33.6 kbit/s[d] 7/4.2 kB/s 1998
Modem 56k (8000/8000 baud; V.92) 56.0/48.0 kbit/s[d] 7/6 kB/s 2001
Modem data compression (variable; V.92/V.44) 56.0–320.0 kbit/s[d] 7–40 kB/s 2000[8]
ISP-side text/image compression (variable) 56.0–1000.0 kbit/s 7–125 kB/s 1998[8]
ISDN Basic Rate Interface (single/dual channel) 64/128 kbit/s[e] 8/16 kB/s 1986[9]
IDSL (dual ISDN + 16 kbit/s data channels) 144 kbit/s 18 kB/s 2000[10]

Broadband (hundreds of kHz to GHz wide)

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Technology Rate Rate ex. overhead Year
ADSL (G.lite) 1536/512 kbit/s 192/64 kB/s 1998
HDSL ITU G.991.1 a.k.a. DS1 1544 kbit/s 193 kB/s 1998[11]
MSDSL 2000 kbit/s 250 kB/s ?
SDSL 2320 kbit/s 290 kB/s ?
SHDSL ITU G.991.2 5690 kbit/s 711 kB/s 2001
ADSL (G.dmt) ITU G.992.1 8192/1024 kbit/s 1024/128 kB/s 1999
ADSL2 ITU G.992.3/4 12288/1440 kbit/s 1536/180 kB/s 2002
ADSL2+ ITU G.992.5 24576/3584 kbit/s 3072/448 kB/s 2003
DOCSIS 1.0[12] (cable modem) 38/9 Mbit/s 4.75/1.125 MB/s 1997
DOCSIS 2.0[13] (cable modem) 38/27 Mbit/s 4.75/3.375 MB/s 2002
VDSL ITU G.993.1 52 Mbit/s 7 MB/s 2001
VDSL2 ITU G.993.2 100 Mbit/s 12.5 MB/s 2006
Uni-DSL 200 Mbit/s 25 MB/s 2006
VDSL2 ITU G.993.2 Amendment 1 (11/15) 300 Mbit/s 37.5 MB/s 2015
BPON (G.983) (fiber optic service) 622/155 Mbit/s 77.7/19.3 MB/s 2005[14]
G.fast ITU G.9700 1000 Mbit/s 125 MB/s 2014
EPON (802.3ah) (fiber optic service) 1000/1000 Mbit/s 125/125 MB/s 2008
DOCSIS 3.0[15] (cable modem) 1216/216 Mbit/s 152/27 MB/s 2006
GPON (G.984) (fiber optic service) 2488/1244 Mbit/s 311/155.5 MB/s 2008[16]
DOCSIS 3.1[17] (cable modem) 10/2 Gbit/s 1.25/0.25 GB/s 2013
10G-PON (G.987) (fiber optic service) 10/2.5 Gbit/s 1.25/0.3125 GB/s 2012[18]
DOCSIS 4.0 (cable modem) 10/6 Gbit/s 1.25/0.75 GB/s 2017
XGS-PON (G.9807.1) (fiber optic service) 10/10 Gbit/s 1.25/1.25 GB/s 2016
NG-PON2 (G.989) (fiber optic service) 40/10 Gbit/s 5/1.25 GB/s 2015[19]

Mobile telephone interfaces

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Technology Download rate Upload rate Year
GSM CSD (2G) 14.4 kbit/s[f] 1.8 kB/s 14.4 kbit/s 1.8 kB/s
HSCSD 57.6 kbit/s 7.2 kB/s 14.4 kbit/s 1.8 kB/s
GPRS (2.5G) 57.6 kbit/s 7.2 kB/s 28.8 kbit/s 3.6 kB/s
WiDEN 100 kbit/s 12.5 kB/s 100 kbit/s 12.5 kB/s
CDMA2000 1×RTT 153 kbit/s 18 kB/s 153 kbit/s 18 kB/s
EDGE (2.75G) (type 1 MS) 236.8 kbit/s 29.6 kB/s 236.8 kbit/s 29.6 kB/s 2002
UMTS 3G 384 kbit/s 48 kB/s 384 kbit/s 48 kB/s
EDGE (type 2 MS) 473.6 kbit/s 59.2 kB/s 473.6 kbit/s 59.2 kB/s
EDGE Evolution (type 1 MS) 1184 kbit/s 148 kB/s 474 kbit/s 59 kB/s
EDGE Evolution (type 2 MS) 1894 kbit/s 237 kB/s 947 kbit/s 118 kB/s
1×EV-DO rev. 0 2457 kbit/s 307.2 kB/s 153 kbit/s 19 kB/s
1×EV-DO rev. A 3.1 Mbit/s 397 kB/s 1.8 Mbit/s 230 kB/s
LTE Cat 1 10 Mbit/s 1250 kB/s 5.2 Mbit/s 650 kB/s
1×EV-DO rev. B 14.7 Mbit/s 1837 kB/s 5.4 Mbit/s 675 kB/s
HSPA (3.5G) 13.98 Mbit/s 1706 kB/s 5.760 Mbit/s 720 kB/s
4×EV-DO Enhancements (2×2 MIMO) 34.4 Mbit/s 4.3 MB/s 12.4 Mbit/s 1.55 MB/s
HSPA+ (2×2 MIMO) 42 Mbit/s 5.25 MB/s 11.5 Mbit/s 1.437 MB/s
LTE Cat 2 50 Mbit/s 6.25 MB/s 25 Mbit/s 3.375 MB/s
15×EV-DO rev. B 73.5 Mbit/s 9.2 MB/s 27 Mbit/s 3.375 MB/s
LTE Cat 3 100 Mbit/s 12.5 MB/s 50 Mbit/s 6.25 MB/s
UMB (2×2 MIMO) 140 Mbit/s 17.5 MB/s 34 Mbit/s 4.250 MB/s
LTE Cat 4 150 Mbit/s 18.75 MB/s 50 Mbit/s 6.25 MB/s
LTE (2×2 MIMO) 173 Mbit/s 21.625 MB/s 58 Mbit/s 7.25 MB/s 2004
UMB (4×4 MIMO) 280 Mbit/s 35 MB/s 68 Mbit/s 8.5 MB/s
EV-DO rev. C 280 Mbit/s 35 MB/s 75 Mbit/s 9 MB/s
LTE Cat 5 300 Mbit/s 37.5 MB/s 50 Mbit/s 6.25 MB/s
LTE Cat 6 300 Mbit/s 37.5 MB/s 75 Mbit/s 9.375 MB/s
LTE Cat 7 300 Mbit/s 37.5 MB/s 100 Mbit/s 12.5 MB/s
LTE (4×4 MIMO) 326 Mbit/s 40.750 MB/s 86 Mbit/s 10.750 MB/s
LTE Cat 13 390 Mbit/s 48.75 MB/s 150 Mbit/s 18.75 MB/s
LTE Cat 9 450 Mbit/s 56.25 MB/s 50 Mbit/s 6.25 MB/s
LTE Cat 10 450 Mbit/s 56.25 MB/s 100 Mbit/s 12.5 MB/s
LTE Cat 11 600 Mbit/s 75 MB/s 50 Mbit/s 6.25 MB/s
LTE Cat 12 600 Mbit/s 75 MB/s 100 Mbit/s 12.5 MB/s
LTE Cat 16 1000 Mbit/s 125 MB/s 50 Mbit/s 6.25 MB/s
LTE Cat 18 1200 Mbit/s 150 MB/s 150 Mbit/s 18.75 MB/s
LTE Cat 21 1400 Mbit/s 175 MB/s 300 Mbit/s 37.5 MB/s
LTE Cat 20 2000 Mbit/s 250 MB/s 300 Mbit/s 37.5 MB/s
LTE Cat 8 3 Gbit/s 375 MB/s 1.5 Gbit/s 187 MB/s
LTE Cat 14 3.9 Gbit/s 487 MB/s 1.5 Gbit/s 187 MB/s
5G NR ? ? ? ? ?

Wide area networks

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Technology Rate Year
56k line 56 kbit/s 7 KB/s 1990
DS0 64 kbit/s 8 KB/s
G.lite (a.k.a. ADSL Lite) 1.536/0.512 Mbit/s 0.192/0.064 MB/s
DS1 / T1 (and ISDN Primary Rate Interface) 1.544 Mbit/s 0.192 MB/s 1990
E1 (and ISDN Primary Rate Interface) 2.048 Mbit/s 0.256 MB/s
G.SHDSL 2.304 Mbit/s 0.288 MB/s
SDSL[g] 2.32 Mbit/s 0.29 MB/s
LR-VDSL2 (4 to 5 km [long-]range) (symmetry optional) 4 Mbit/s 0.512 MB/s
T2 6.312 Mbit/s 0.789 MB/s
ADSL[h] 8.0/1.024 Mbit/s 1.0/0.128 MB/s
E2 8.448 Mbit/s 1.056 MB/s
ADSL2 12/3.5 Mbit/s 1.5/0.448 MB/s
Satellite Internet[i] 16/1 Mbit/s 2.0/0.128 MB/s
ADSL2+ 24/3.5 Mbit/s 3.0/0.448 MB/s
E3 34.368 Mbit/s 4.296 MB/s
DOCSIS 1.0 (cable modem)[12] 38/9 Mbit/s 4.75/1.125 MB/s 1997
DOCSIS 2.0 (cable modem)[13] 38/27 Mbit/s 4.75/3.38 MB/s 2002
DS3 / T3 ('45 Meg') 44.736 Mbit/s 5.5925 MB/s
STS-1 / OC-1 / STM-0 51.84 Mbit/s 6.48 MB/s
VDSL (symmetry optional) 100 Mbit/s 12.5 MB/s
OC-3 / STM-1 155.52 Mbit/s 19.44 MB/s
VDSL2 (symmetry optional) 250 Mbit/s 31.25 MB/s
T4 274.176 Mbit/s 34.272 MB/s
T5 400.352 Mbit/s 50.044 MB/s
OC-9 466.56 Mbit/s 58.32 MB/s
OC-12 / STM-4 622.08 Mbit/s 77.76 MB/s
OC-18 933.12 Mbit/s 116.64 MB/s
DOCSIS 3.0 (cable modem)[15] 1216/216 Mbit/s 152/27 MB/s 2006
OC-24 1.244 Gbit/s 155.5 MB/s
OC-36 1.900 Gbit/s 237.5 MB/s
OC-48 / STM-16 2.488 Gbit/s 311.04 MB/s
OC-96 4.976 Gbit/s 622.08 MB/s
OC-192 / STM-64 9.953 Gbit/s 1.244125 GB/s
10 Gigabit Ethernet WAN PHY 9.953 Gbit/s 1.244125 GB/s
DOCSIS 3.1 (cable modem) 10/2 Gbit/s 1.25/0.25 GB/s 2013
DOCSIS 4.0 (cable modem) 10/6 Gbit/s 1.25/0.75 GB/s 2017
OC-256 13.271 Gbit/s 1.659 GB/s
OC-768 / STM-256 39.813 Gbit/s 4.976 GB/s
OC-1536 / STM-512 79.626 Gbit/s 9.953 GB/s
OC-3072 / STM-1024 159.252 Gbit/s 19.907 GB/s

Local area networks

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Technology Rate Year
LocalTalk 230 kbit/s 28.8 kB/s 1988
Econet 800 kbit/s 100 kB/s 1981
Omninet 1 Mbit/s 125 kB/s 1980
IBM PC Network 2 Mbit/s 250 kB/s 1985
ARCNET (Standard) 2.5 Mbit/s 312.5 kB/s 1977
Chaosnet (Original) 4 Mbit/s 3.0 Mbit/s 1971
Token Ring (Original) 4 Mbit/s 500 kB/s 1985
Ethernet (10BASE-X) 10 Mbit/s 1.25 MB/s 1980 (1985 IEEE Standard)
Token Ring (Later) 16 Mbit/s 2 MB/s 1989
ARCnet Plus 20 Mbit/s 2.5 MB/s 1992
TCNS 100 Mbit/s 12.5 MB/s 1993?
100VG 100 Mbit/s 12.5 MB/s 1995
Token Ring IEEE 802.5t 100 Mbit/s 12.5 MB/s
Fast Ethernet (100BASE-X) 100 Mbit/s 12.5 MB/s 1995
FDDI 100 Mbit/s 12.5 MB/s
MoCA 1.0[20] 100 Mbit/s 12.5 MB/s
MoCA 1.1[20] 175 Mbit/s 21.875 MB/s
HomePlug AV 200 Mbit/s 25 MB/s 2005
FireWire (IEEE 1394) 400[j][k] 400 Mbit/s 50 MB/s 1995
MoCa 2.0 500 Mbit/s 2016
HIPPI 800 Mbit/s 100 MB/s
IEEE 1901 1000 Mbit/s 125 MB/s 2010
Token Ring IEEE 802.5v 1 Gbit/s 125 MB/s 2001
Gigabit Ethernet (1000BASE-X) 1 Gbit/s 125 MB/s 1998
Stanford DASH/NUMAlink 1 1.920 Gbit/s 240 MB/s ~1990
Myrinet 2000 2 Gbit/s 250 MB/s
InfiniBand SDR 1×[23] 2 Gbit/s 250 MB/s 2001, 2003
Reflective memory or RFM2 (1.25 μs latency) 2 Gbit/s 250 MB/s 2017
RapidIO Gen1 1× 2.5 Gbit/s 312.5 MB/s 2000
2.5 Gigabit Ethernet (2.5GBASE-T) 2.5 Gbit/s 312.5 MB/s 2016
Quadrics QsNetI 3.6 Gbit/s 450 MB/s
InfiniBand DDR 1×[23] 4 Gbit/s 500 MB/s 2005
RapidIO Gen2 1× 5 Gbit/s 625 MB/s 2008
5 Gigabit Ethernet (5GBASE-T) 5 Gbit/s 625 MB/s 2016
InfiniBand QDR 1×[23] 8 Gbit/s 1 GB/s 2007
InfiniBand SDR 4×[23] 8 Gbit/s 1 GB/s 2001, 2003
Quadrics QsNetII 8 Gbit/s 1 GB/s
RapidIO Gen1 4x 10 Gbit/s 1.25 GB/s
RapidIO Gen2 2x 10 Gbit/s 1.25 GB/s 2008
10 Gigabit Ethernet (10GBASE-X) 10 Gbit/s 1.25 GB/s 2002-2006
Myri 10G 10 Gbit/s 1.25 GB/s
InfiniBand FDR-10 1×[24] 10 Gbit/s 1.25 GB/s 2011
NUMAlink 2 12.8 Gbit/s 1.6 GB/s 1996
InfiniBand FDR 1×[24] 13.64 Gbit/s 1.7 GB/s 2011
InfiniBand SDR 8×[23] 16 Gbit/s 2 GB/s 2001, 2003
InfiniBand DDR 4×[23] 16 Gbit/s 2 GB/s 2005
RapidIO Gen2 4x 20 Gbit/s 2.5 GB/s 2008
Scalable Coherent Interface (SCI) Dual Channel SCI, x8 PCIe 20 Gbit/s 2.5 GB/s
InfiniBand SDR 12×[23] 24 Gbit/s 3 GB/s
RapidIO Gen4 1× 24.63 Gbit/s 3.079 GB/s 2016
InfiniBand EDR 1×[24] 25 Gbit/s 3.125 GB/s 2014
25 Gigabit Ethernet (25GBASE-X) 25 Gbit/s 3.125 GB/s 2016
NUMAlink 3 25.6 Gbit/s 3.2 GB/s 2000
InfiniBand DDR 8×[23] 32 Gbit/s 6 GB/s 2005
InfiniBand QDR 4×[23] 32 Gbit/s 4 GB/s 2007
RapidIO Gen2 8x 40 Gbit/s 5 GB/s 2008
40 Gigabit Ethernet (40GBASE-X) 4× 40 Gbit/s 5 GB/s 2010
InfiniBand FDR-10 4×[24] 40 Gbit/s 5 GB/s 2011
InfiniBand DDR 12×[23] 48 Gbit/s 6 GB/s 2005
50 Gigabit Ethernet (50GBASE-X) 50 Gbit/s 6.25 GB/s 2016
InfiniBand HDR 1×[25] 50 Gbit/s 6.25 GB/s[24] 2017
NUMAlink 4 51.2 Gbit/s 6.4 GB/s 2004
NUMAlink 6 53.6 Gbit/s 6.7 GB/s 2012
InfiniBand FDR 4×[24] 54.56 Gbit/s 6.82 GB/s 2011
InfiniBand QDR 8×[23] 64 Gbit/s 4 GB/s 2007
RapidIO Gen2 16× 80 Gbit/s 10 GB/s 2008
InfiniBand FDR-10 8×[24] 80 Gbit/s 5 GB/s 2011
InfiniBand QDR 12×[23] 96 Gbit/s 12 GB/s 2007
InfiniBand EDR 4×[24] 100 Gbit/s 12.5 GB/s 2014
100 Gigabit Ethernet (100GBASE-X) 10×/4× 100 Gbit/s 12.5 GB/s 2010/2018
Omni-Path 100 Gbit/s 12.5 GB/s 2015
InfiniBand NDR 1× 100 Gbit/s 12.5 GB/s[24] 2022
NUMAlink 8 (Flex ASIC) 106.4 Gbit/s 13.3 GB/s 2017
InfiniBand FDR 8×[24] 109.12 Gbit/s 13.64 GB/s 2011
NUMAlink 7 119.52 Gbit/s 14.94 GB/s 2014
NUMAlink 5 120 Gbit/s 15 GB/s 2009
InfiniBand FDR-10 12×[24] 120 Gbit/s 15 GB/s 2011
InfiniBand FDR 12×[24] 163.68 Gbit/s 20.45 GB/s 2011
InfiniBand EDR 8×[24] 200 Gbit/s 25 GB/s 2014
InfiniBand HDR 4×[25] 200 Gbit/s 25 GB/s[24] 2017
200 Gigabit Ethernet (200GBASE-X) 200 Gbit/s 25 GB/s 2017
InfiniBand XDR 1× 200 Gbit/s 25 GB/s[24] 2024
InfiniBand EDR 12×[24] 300 Gbit/s 37.5 GB/s 2014
400 Gigabit Ethernet (400GBASE-X) 400 Gbit/s 50 GB/s 2017
InfiniBand HDR 8×[25] 400 Gbit/s 50 GB/s[24] 2017
InfiniBand NDR 4× 400 Gbit/s 50 GB/s[24] 2022
InfiniBand GDR 1× 400 Gbit/s 50 GB/s[24] TBA
InfiniBand HDR 12×[25] 600 Gbit/s 75 GB/s[24] 2017
InfiniBand NDR 8× 800 Gbit/s 100 GB/s[24] 2022
InfiniBand XDR 4× 800 Gbit/s 100 GB/s[24] 2024
800 Gigabit Ethernet (800GBASE-X) 800 Gbit/s 100 GB/s 2024
InfiniBand NDR 12× 1200 Gbit/s 150 GB/s[24] 2022
InfiniBand XDR 8× 1600 Gbit/s 200 GB/s[24] 2024
InfiniBand GDR 4× 1600 Gbit/s 200 GB/s[24] TBA
InfiniBand XDR 12× 2400 Gbit/s 300 GB/s[24] 2024
InfiniBand GDR 8× 3200 Gbit/s 400 GB/s[24] TBA
InfiniBand GDR 12× 4800 Gbit/s 600 GB/s[24] TBA

Wireless networks

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802.11 networks in infrastructure mode are half-duplex; all stations share the medium. In infrastructure or access point mode, all traffic has to pass through an Access Point (AP). Thus, two stations on the same access point that are communicating with each other must have each and every frame transmitted twice: from the sender to the access point, then from the access point to the receiver. This approximately halves the effective bandwidth.

802.11 networks in ad hoc mode are still half-duplex, but devices communicate directly rather than through an access point. In this mode all devices must be able to see each other, instead of only having to be able to see the access point.

Standard Maximum Link Rate Year
Classic WaveLAN 2 Mbit/s 250 kB/s 1988
IEEE 802.11 2 Mbit/s 250 kB/s 1997
RONJA (full duplex) 10 Mbit/s 1.25 MB/s 2001
IEEE 802.11a 54 Mbit/s 6.75 MB/s 1999
IEEE 802.11b 11 Mbit/s 1.375 MB/s 1999
IEEE 802.11g 54 Mbit/s 6.75 MB/s 2003
IEEE 802.16 (WiMAX) 70 Mbit/s 8.75 MB/s 2004
IEEE 802.11g with
Super G by Atheros		 108 Mbit/s 13.5 MB/s 2003
IEEE 802.11g with 125 High
Speed Mode by Broadcom		 125 Mbit/s 15.625 MB/s 2003
IEEE 802.11g with Nitro by Conexant 140 Mbit/s 17.5 MB/s 2003
IEEE 802.11n (aka Wi-Fi 4) 600 Mbit/s 75 MB/s 2009
IEEE 802.11ac (aka Wi-Fi 5) 6.8–6.93 Gbit/s 850–866.25 MB/s 2012
IEEE 802.11ad 7.14–7.2 Gbit/s 892.5–900 MB/s 2011
IEEE 802.11ax (aka Wi-Fi 6/6E) 11 Gbit/s 1.375 GB/s 2019
IEEE 802.11be (aka Wi-Fi 7 or
Extremely High Throughput (EHT))		 46.12 Gbit/s
expected		 5.765 GB/s
expected		 Late 2024
expected
IEEE 802.11bn (aka Wi-Fi 8 or
Ultra High Reliability (UHR))		 100 Gbit/s
expected		 12.5 GB/s
expected		 2028
expected
IEEE 802.11ay (aka Enhanced
Throughput for Operation in License
-exempt Bands above 45 GHz)		 176 Gbit/s
expected		 22 GB/s
expected		 March 2021
standardized

Wireless personal area networks

edit
Technology Rate Year
ANT 20 kbit/s 2.5 kB/s
IrDA-Control 72 kbit/s 9 kB/s
IrDA-SIR 115.2 kbit/s 14 kB/s
802.15.4 (2.4 GHz) 250 kbit/s 31.25 kB/s
Bluetooth 1.1 1 Mbit/s 125 kB/s 2002
Bluetooth 2.0+EDR 3 Mbit/s 375 kB/s 2004
IrDA-FIR 4 Mbit/s 500 kB/s
IrDA-VFIR 16 Mbit/s 2 MB/s
Bluetooth 3.0 25 Mbit/s 3.125 MB/s 2009
Bluetooth 4.0 25 Mbit/s 3.125 MB/s 2010
Bluetooth 5.0 50 Mbit/s 6.25 MB/s 2016
IrDA-UFIR 96 Mbit/s 12 MB/s
WUSB-UWB 480 Mbit/s 60 MB/s
IrDA-Giga-IR 1024 Mbit/s 128 MB/s

Computer buses

edit

Main buses

edit
Technology Rate Year
I²C 3.4 Mbit/s 425 kB/s 1992 (standardized)
Apple II (incl. Apple IIGS) 8-bit/1 MHz 8 Mbit/s 1 MB/s[26][27] 1977
SS-50 Bus 8-bit/1(?) MHz 8 Mbit/s 1 MB/s 1975
STD-80 8-bit/8 MHz 16 Mbit/s 2 MB/s
ISA 8-Bit/4.77 MHz 0 W/S: every 4 clocks 8 bits
1 W/S: every 5 clocks 8 bits		 0 W/S: every 4 clocks 1 byte
1 W/S: every 5 clocks 1 byte		 1981 (created)
STD-80 16-bit/8 MHz 32 Mbit/s 4 MB/s
I3C (HDR mode)[28] 33.3 Mbit/s 4.16 MB/s 2017
Zorro II 16-bit/7.14 MHz[29] 42.4 Mbit/s 5.3 MB/s 1986
ISA 16-Bit/8.33 MHz 66.64 Mbit/s 8.33 MB/s 1984 (created)
Europe Card Bus 8-Bit/10 MHz 66.7 Mbit/s 8.33 MB/s 1977 (created)
S-100 bus 8-bit/10 MHz 80 Mbit/s 10 MB/s 1976 (published)
Serial Peripheral Interface (Up to 100 MHz) 100 Mbit/s 12.5 MB/s 1989
Low Pin Count 125 Mbit/s 15.63 MB/s [x] 2002
STEbus 8-Bit/16 MHz 128 Mbit/s 16 MB/s 1987 (standardized)
C-Bus 16-bit/10 MHz 160 Mbit/s 20 MB/s[30] 1982
HP Precision Bus 184 Mbit/s 23 MB/s
STD-32 32-bit/8 MHz 256 Mbit/s 32 MB/s[31]
NESA 32-bit/8 MHz 256 Mbit/s 32 MB/s[32]
EISA 32-bit/8.33 MHz 266.56 Mbit/s 33.32 MB/s 1988
VME64 32-64bit 400 Mbit/s 40 MB/s 1981
MCA 32bit/10 MHz 400 Mbit/s 40 MB/s 1987
NuBus 10 MHz 400 Mbit/s 40 MB/s 1987 (standardized)
DEC TURBOchannel 32-bit/12.5 MHz 400 Mbit/s 50 MB/s
NuBus90 20 MHz 800 Mbit/s 80 MB/s 1991
MCA 32bit/20 MHz 800 Mbit/s 80 MB/s[33] 1992
APbus 32-bit/25(?) MHz 800 Mbit/s 100 MB/s[34]
Sbus 32-bit/25 MHz 800 Mbit/s 100 MB/s 1989
DEC TURBOchannel 32-bit/25 MHz 800 Mbit/s 100 MB/s
Local Bus 98 32-bit/33 MHz 1056 Mbit/s 132 MB/s[35]
VESA Local Bus (VLB) 32-bit/33 MHz 1067 Mbit/s 133.33 MB/s 1992
PCI 32-bit/33 MHz 1067 Mbit/s 133.33 MB/s 1993
HP GSC-1X 1136 Mbit/s 142 MB/s
Zorro III 32-bit/async (eq. 37.5 MHz)[36][37] 1200 Mbit/s 150 MB/s[38] 1990
VESA Local Bus (VLB) 32-bit/40 MHz 1280 Mbit/s 160 MB/s 1992
Sbus 64-bit/25 MHz 1.6 Gbit/s 200 MB/s 1995
HP GSC-2X 2.048 Gbit/s 256 MB/s
PCI 64-bit/33 MHz 2.133 Gbit/s 266.7 MB/s 1993
PCI 32-bit/66 MHz 2.133 Gbit/s 266.7 MB/s 1995
AGP 1× 2.133 Gbit/s 266.7 MB/s 1997
PCI Express 1.0 (×1 link)[l] 2.5 Gbit/s 250 MB/s [z] 2004
RapidIO Gen1 1× 2.5 Gbit/s 312.5 MB/s
HIO bus 2.560 Gbit/s 320 MB/s
GIO64 64-bit/40 MHz 2.560 Gbit/s 320 MB/s
PCI Express 2.0 (×1 link)[m] 5 Gbit/s 500 MB/s [z] 2007
AGP 2× 4.266 Gbit/s 533.3 MB/s 1997
PCI 64-bit/66 MHz 4.266 Gbit/s 533.3 MB/s
PCI-X DDR 16-bit 4.266 Gbit/s 533.3 MB/s
RapidIO Gen2 1× 5 Gbit/s 625 MB/s
PCI 64-bit/100 MHz 6.4 Gbit/s 800 MB/s
PCI Express 3.0 (×1 link)[n] 8 Gbit/s 984.6 MB/s [y] 2011
Unified Media Interface (UMI) (×4 link) 10 Gbit/s 1 GB/s [z] 2011
Direct Media Interface (DMI) (×4 link) 10 Gbit/s 1 GB/s [z] 2004
Enterprise Southbridge Interface (ESI) 8 Gbit/s 1 GB/s
PCI Express 1.0 (×4 link)[l] 10 Gbit/s 1 GB/s [z] 2004
AGP 4× 8.533 Gbit/s 1.067 GB/s 1998
PCI-X 133 8.533 Gbit/s 1.067 GB/s
PCI-X QDR 16-bit 8.533 Gbit/s 1.067 GB/s
InfiniBand single 4×[23] 8 Gbit/s 1 GB/s [z]
RapidIO Gen1 4× 10 Gbit/s 1.25 GB/s
RapidIO Gen2 2× 10 Gbit/s 1.25 GB/s
UPA 15.360 Gbit/s 1.92 GB/s
Unified Media Interface 2.0 (UMI 2.0; ×4 link) 20 Gbit/s 2 GB/s [z] 2012
Direct Media Interface 2.0 (DMI 2.0; ×4 link) 20 Gbit/s 2 GB/s [z] 2011
PCI Express 1.0 (×8 link)[l] 20 Gbit/s 2 GB/s [z] 2004
PCI Express 2.0 (×4 link)[m] 20 Gbit/s 2 GB/s [z] 2007
AGP 8× 17.066 Gbit/s 2.133 GB/s 2002
PCI-X DDR 17.066 Gbit/s 2.133 GB/s
RapidIO Gen2 4× 20 Gbit/s 2.5 GB/s
Sun JBus (200 MHz) 20.48 Gbit/s 2.56 GB/s 2003
HyperTransport (800 MHz, 16-pair) 25.6 Gbit/s 3.2 GB/s 2001
PCI Express 3.0 (×4 link)[n] 32 Gbit/s 3.94 GB/s [y] 2011
HyperTransport (1 GHz, 16-pair) 32 Gbit/s 4 GB/s
PCI Express 1.0 (×16 link)[l] 40 Gbit/s 4 GB/s [z] 2004
PCI Express 2.0 (×8 link)[m] 40 Gbit/s 4 GB/s [z] 2007
PCI-X QDR 34.133 Gbit/s 4.266 GB/s
AGP 8× 64-bit 34.133 Gbit/s 4.266 GB/s
RapidIO Gen2 8x 40 Gbit/s 5 GB/s
Direct Media Interface 3.0 (DMI 3.0; ×4 link) 31.5 Gbit/s 3.94 GB/s [y] 2015
CXL Specification 3.0 & 3.1 (×1 link) 60.504 Gbit/s 7.563 GB/s 2022, 2023
PCI Express 3.0 (×8 link)[n] 64 Gbit/s 7.88 GB/s [y] 2011
PCI Express 2.0 (×16 link)[n] 80 Gbit/s 8 GB/s [z] 2007
RapidIO Gen2 16x 80 Gbit/s 10 GB/s
PCI Express 5.0 (×4 link) 128 Gbit/s 15.75 GB/s[y] 2019
PCI Express 3.0 (×16 link)[n] 128 Gbit/s 15.75 GB/s [y] 2011
CAPI 128 Gbit/s 15.75 GB/s [y] 2014
QPI (4.80GT/s, 2.40 GHz) 153.6 Gbit/s 19.2 GB/s
HyperTransport 2.0 (1.4 GHz, 32-pair) 179.2 Gbit/s 22.4 GB/s 2004
QPI (5.86GT/s, 2.93 GHz) 187.52 Gbit/s 23.44 GB/s
QPI (6.40GT/s, 3.20 GHz) 204.8 Gbit/s 25.6 GB/s
QPI (7.2GT/s, 3.6 GHz) 230.4 Gbit/s 28.8 GB/s 2012
PCI Express 6.0 (×4 link) 242 Gbit/s 30.25 GB/s[w] 2022
PCI Express 4.0 (×16 link)[39] 256 Gbit/s 31.51 GB/s[y] 2018
CAPI 2 256 Gbit/s 31.51 GB/s[y] 2016
QPI (8.0GT/s, 4.0 GHz) 256.0 Gbit/s 32.0 GB/s 2012
QPI (9.6GT/s, 4.8 GHz) 307.2 Gbit/s 38.4 GB/s 2014
HyperTransport 3.0 (2.6 GHz, 32-pair) 332.8 Gbit/s 41.6 GB/s 2006
HyperTransport 3.1 (3.2 GHz, 32-pair) 409.6 Gbit/s 51.2 GB/s 2008
CXL Specification 1.x & 2.0 (×16 link) 512 Gbit/s 63.02 GB/s 2019, 2020
PCI Express 5.0 (×16 link) [40] 512 Gbit/s 63.02 GB/s[y] 2019
NVLink 1.0 640 Gbit/s 80 GB/s 2016
PCI Express 6.0 (×16 link) [41] 968 Gbit/s 121 GB/s[w] 2022
CXL Specification 3.0 & 3.1 (×16 link) 968 Gbit/s 121 GB/s 2022, 2023
NVLink 2.0 1.2 Tbit/s 150 GB/s 2017
PCI Express 7.0 (×16 link) 1.936 Tbit/s 242 GB/s[w] 2025
Infinity Fabric (Max. theoretical) 4.096 Tbit/s 512 GB/s 2017

x LPC protocol includes high overhead. While the gross data rate equals 33.3 million 4-bit-transfers per second (or 16.67 MB/s), the fastest transfer, firmware read, results in 15.63 MB/s. The next fastest bus cycle, 32-bit ISA-style DMA write, yields only 6.67 MB/s. Other transfers may be as low as 2 MB/s.[42]

y Uses 128b/130b encoding, meaning that about 1.54% of each transfer is used for error detection instead of carrying data between the hardware components at each end of the interface. For example, a single link PCIe 3.0 interface has an 8 Gbit/s transfer rate, yet its usable bandwidth is only about 7.88 Gbit/s.

z Uses 8b/10b encoding, meaning that 20% of each transfer is used by the interface instead of carrying data from between the hardware components at each end of the interface. For example, a single link PCIe 1.0 has a 2.5 Gbit/s transfer rate, yet its usable bandwidth is only 2 Gbit/s (250 MB/s).

w Uses PAM-4 encoding and a 256 bytes FLIT block, of which 14 bytes are FEC and CRC, meaning that 5.47% of total data rate is used for error detection and correction instead of carrying data. For example, a single link PCIe 6.0 interface has an 64 Gbit/s total transfer rate, yet its usable bandwidth is only 60.5 Gbit/s.

Portable

edit
Technology Rate Year
PC Card 16-bit 255 ns byte mode 31.36 Mbit/s 3.92 MB/s 1990
PC Card 16-bit 255 ns word mode 62.72 Mbit/s 7.84 MB/s
PC Card 16-bit 100 ns byte mode 80 Mbit/s 10 MB/s
PC Card 16-bit 100 ns word mode 160 Mbit/s 20 MB/s
PC Card 32-bit (CardBus) byte mode 267 Mbit/s 33.33 MB/s
ExpressCard 1.2 USB 2.0 mode 480 Mbit/s 60 MB/s 2003
PC Card 32-bit (CardBus) word mode 533 Mbit/s 66.66 MB/s
PC Card 32-bit (CardBus) doubleword mode 1067 Mbit/s 133.33 MB/s
ExpressCard 1.2 PCI Express mode 2500 Mbit/s 250 MB/s 2008
ExpressCard 2.0 USB 3.0 mode 4800 Mbit/s 600 MB/s
ExpressCard 2.0 PCI Express mode 5000 Mbit/s 625 MB/s 2009

Storage

edit
Technology Rate Year
Teletype Model 33 paper tape 80 bit/s 10 B/s 1963
TRS-80 Model 1 Level 1 BASIC cassette tape interface 250 bit/s 32 B/s 1977
C2N Commodore Datasette 1530 cassette tape interface 300 bit/s 15 B/s 1977
Apple II cassette tape interface 1.5 kbit/s 200 B/s 1977
Amstrad CPC tape 2.0 kbit/s 250 B/s 1984
Single Density 8-inch FM Floppy Disk Controller (160 KB) 250 kbit/s 31 KB/s 1973
Single Density 5.25-inch FM Floppy Disk Controller (180 KB) 125 kbit/s 15.5 KB/s 1978
High Density MFM Floppy Disk Controller (1.2 MB/1.44 MB) 250 kbit/s 31 KB/s 1984
CD Controller (1×) 1.171 Mbit/s 0.146 MB/s 1988
MFM hard disk 5 Mbit/s 0.625 MB/s 1980
RLL hard disk 7.5 Mbit/s 0.937 MB/s
DVD Controller (1×) 11.1 Mbit/s 1.32 MB/s
ESDI 24 Mbit/s 3 MB/s
ATA PIO Mode 0 26.4 Mbit/s 3.3 MB/s 1986
HD DVD Controller (1×) 36 Mbit/s 4.5 MB/s
Blu-ray Controller (1×) 36 Mbit/s 4.5 MB/s
SCSI (Narrow SCSI) (5 MHz)[o] 40 Mbit/s 5 MB/s 1986
ATA PIO Mode 1 41.6 Mbit/s 5.2 MB/s 1994
ATA PIO Mode 2 66.4 Mbit/s 8.3 MB/s 1994
Fast SCSI (8 bits/10 MHz) 80 Mbit/s 10 MB/s
ATA PIO Mode 3 88.8 Mbit/s 11.1 MB/s 1996
AoE over Fast Ethernet[p] 100 Mbit/s 11.9 MB/s 2009
iSCSI over Fast Ethernet[q] 100 Mbit/s 11.9 MB/s 2004
ATA PIO Mode 4 133.3 Mbit/s 16.7 MB/s 1996
Fast Wide SCSI (16 bits/10 MHz) 160 Mbit/s 20 MB/s
Ultra SCSI (Fast-20 SCSI) (8 bits/20 MHz) 160 Mbit/s 20 MB/s
SD (High Speed) 200 Mbit/s 25 MB/s
Ultra DMA ATA 33 264 Mbit/s 33 MB/s 1998
Ultra Wide SCSI (16 bits/20 MHz) 320 Mbit/s 40 MB/s
Ultra-2 SCSI 40 (Fast-40 SCSI) (8 bits/40 MHz) 320 Mbit/s 40 MB/s
SDHC/SDXC/SDUC (UHS-I Full Duplex) 400 Mbit/s 50 MB/s
Ultra DMA ATA 66 533.6 Mbit/s 66.7 MB/s 2000
Blu-ray Controller (16×) 576 Mbit/s 72 MB/s
Ultra-2 wide SCSI (16 bits/40 MHz) 640 Mbit/s 80 MB/s
Serial Storage Architecture SSA 640 Mbit/s 80 MB/s 1990
Ultra DMA ATA 100 800 Mbit/s 100 MB/s 2002
Fibre Channel 1GFC (1.0625 GHz)[r] 850 Mbit/s 103.23 MB/s 1997
AoE over gigabit Ethernet, jumbo frames[s] 1 Gbit/s 124.2 MB/s 2009
iSCSI over gigabit Ethernet, jumbo frames[t] 1 Gbit/s 123.9 MB/s 2004
Ultra DMA ATA 133 1.064 Gbit/s 133 MB/s 2005
SDHC/SDXC/SDUC (UHS-II Full Duplex) 1.25 Gbit/s 156 MB/s
Ultra-3 SCSI (Ultra 160 SCSI; Fast-80 Wide SCSI) (16 bits/40 MHz DDR) 1.28 Gbit/s 160 MB/s
SATA revision 1.0[u] 1.500 Gbit/s 150 MB/s [a] 2003
Fibre Channel 2GFC (2.125 GHz)[r] 1.700 Gbit/s 206.5 MB/s 2001
Ultra-320 SCSI (Ultra4 SCSI) (16 bits/80 MHz DDR) 2.560 Gbit/s 320 MB/s
Serial Attached SCSI (SAS) SAS-1[u] 3 Gbit/s 300 MB/s [a] 2004
SATA Revision 2.0[u] 3 Gbit/s 300 MB/s [a] 2004
SDHC/SDXC/SDUC (UHS-III Full Duplex) 2.5 Gbit/s 312 MB/s
Fibre Channel 4GFC (4.25 GHz)[r] 3.4 Gbit/s 413 MB/s 2004
Serial Attached SCSI (SAS) SAS-2[u] 6 Gbit/s 600 MB/s [a] 2009
SATA Revision 3.0[u] 6 Gbit/s 600 MB/s [a] 2008
Fibre Channel 8GFC (8.50 GHz)[r] 6.8 Gbit/s 826 MB/s 2005
SDHC/SDXC/SDUC (SD Express) 7.9 Gbit/s 985 MB/s
AoE over 10GbE[s] 10 Gbit/s 1.242 GB/s 2009
iSCSI over 10GbE[t] 10 Gbit/s 1.239 GB/s 2004
FCoE over 10GbE[v] 10 Gbit/s 1.206 GB/s 2009
Serial Attached SCSI (SAS) SAS-3[u] 12 Gbit/s 1.2 GB/s 2013
Fibre Channel 16GFC (14.025 GHz)[r] 13.6 Gbit/s 1.652 GB/s [b] 2011
SATA Express 16 Gbit/s 2 GB/s 2013
Serial Attached SCSI (SAS) SAS-4 22.5 Gbit/s 2.4 GB/s [c] 2017
UFS (version 3.0) 23.2 Gbit/s 2.9 GB/s 2018
Fibre Channel 32GFC (28.05 GHz)[r] 26.424 Gbit/s 3.303 GB/s [b] 2016
NVMe over M.2 or U.2 (using PCI Express 3.0 ×4 link)[n] 32 Gbit/s 3.938 GB/s 2013
iSCSI over InfiniBand 4× 32 Gbit/s 4 GB/s 2007
NVMe over M.2 or U.2 (using PCI Express 4.0 ×4 link) 64 Gbit/s 7.876 GB/s 2017
iSCSI over 100G Ethernet[t] 100 Gbit/s 12.392 GB/s 2010
FCoE over 100G Ethernet[v] 100 Gbit/s 12.064 GB/s 2010
NVMe over M.2, U.2, U.3 or EDSFF (using PCI Express 5.0 ×4 link) 128 Gbit/s 15.754 GB/s 2019

a Uses 8b/10b encoding b Uses 64b/66b encoding c Uses 128b/150b encoding

Peripheral

edit
Technology Rate Year
Apple Desktop Bus 10.0 kbit/s 1.25 kB/s 1986
PS/2 port 12.0 kbit/s 1.5 kB/s 1987
Serial MIDI 31.25 kbit/s 3.9 kB/s 1983
CBM Bus max[w][43] 41.6 kbit/s 5.1 kB/s 1981
Serial RS-232 max 230.4 kbit/s 28.8 kB/s 1962
Serial DMX512A 250.0 kbit/s 31.25 kB/s 1998
Parallel (Centronics/IEEE 1284) 1 Mbit/s 125 kB/s 1970 (standardized 1994)
Serial 16550 UART max 1.5 Mbit/s 187.5 kB/s
USB 1.0 low speed 1.536 Mbit/s 192 kB/s 1996
Serial UART max 2.7648 Mbit/s 345.6 kB/s
GPIB/HPIB (IEEE-488.1) IEEE-488 max. 8 Mbit/s 1 MB/s Late 1960s (standardized 1976)
Serial EIA-422 max. 10 Mbit/s 1.25 MB/s
USB 1.0 full speed 12 Mbit/s 1.5 MB/s 1996
Parallel (Centronics/IEEE 1284) EPP (Enhanced Parallel Port) 16 Mbit/s 2 MB/s 1992
Parallel (Centronics/IEEE 1284) ECP (Extended Capability Port) 20 Mbit/s 2.5 MB/s 1994
Serial EIA-485 max. 35 Mbit/s 4.375 MB/s
GPIB/HPIB (IEEE-488.1-2003) IEEE-488 max. 64 Mbit/s 8 MB/s
FireWire (IEEE 1394) 100 98.304 Mbit/s 12.288 MB/s 1995
FireWire (IEEE 1394) 200 196.608 Mbit/s 24.576 MB/s 1995
FireWire (IEEE 1394) 400 393.216 Mbit/s 49.152 MB/s 1995
USB 2.0 high speed 480 Mbit/s 60 MB/s 2000
FireWire (IEEE 1394b) 800[44] 786.432 Mbit/s 98.304 MB/s 2002
Fibre Channel 1 Gb SCSI 1.0625 Gbit/s 100 MB/s
FireWire (IEEE 1394b) 1600[44] 1.573 Gbit/s 196.6 MB/s 2007
Fibre Channel 2 Gb SCSI 2.125 Gbit/s 200 MB/s
eSATA (SATA 300) 3 Gbit/s 300 MB/s 2004
CoaXPress Base (up and down bidirectional link) 3.125 Gbit/s + 20.833 Mbit/s 390 MB/s 2009
FireWire (IEEE 1394b) 3200[44] 3.1457 Gbit/s 393.216 MB/s 2007
External PCI Express 2.0 ×1 4 Gbit/s 500 MB/s
Fibre Channel 4 Gb SCSI 4.25 Gbit/s 531.25 MB/s
USB 3.0 SuperSpeed (aka USB
3.1 Gen 1, USB 3.2 Gen 1x1)		 5 Gbit/s 500 MB/s 2010
eSATA (SATA 600) 6 Gbit/s 600 MB/s 2011
CoaXPress full (up and down bidirectional link) 6.25 Gbit/s + 20.833 Mbit/s 781 MB/s 2009
External PCI Express 2.0 ×2 8 Gbit/s 1 GB/s
USB 3.1 SuperSpeed+ (aka USB 3.1 Gen 2, USB
3.2 Gen 1x2, USB 3.2 Gen 2x1, USB4 Gen 2×1)		 10 Gbit/s 1.212 GB/s 2013
External PCI Express 2.0 ×4 16 Gbit/s 2 GB/s
Thunderbolt 2 × 10 Gbit/s 2 × 1.25 GB/s 2011
USB 3.2 SuperSpeed+ (aka USB 3.2 Gen
2×2 USB4 Gen 2×2, USB4 Gen 3×1)[45]		 20 Gbit/s 2.424 GB/s 2017
Thunderbolt 2 20 Gbit/s 2.5 GB/s 2013
FPGA Mezzanine Card Plus (FMC+)[46] 28 Gbit/s 3.5 GB/s 2019
External PCI Express 2.0 ×8 32 Gbit/s 4 GB/s
USB4 Gen 3×2[47] 40 Gbit/s 4.8 GB/s 2019
Thunderbolt 3 two links 40 Gbit/s 5 GB/s 2015
Thunderbolt 4 40 Gbit/s 5 GB/s 2020
External PCI Express 2.0 ×16 64 Gbit/s 8 GB/s
USB4 Gen 4 [48] 80 Gbit/s 9.6 GB/s 2022
Thunderbolt 5 80 Gbit/s 9.6 GB/s 2024
USB4 Gen 4 Asymmetric 120 Gbit/s 14.4 GB/s 2022
Thunderbolt 5 Asymmetric 120 Gbit/s 14.4 GB/s 2024

MAC to PHY

edit
Technology Channels Bits MGT Lanes Rate Year
Count Encoding Rate
Media Independent Interface (MII) 1 4 100 Mbit/s 12.5 MB/s
Reduced MII (RMII) 1 2 100 Mbit/s 12.5 MB/s
Serial MII (SMII) 1 1 100 Mbit/s 12.5 MB/s
Gigabit MII (GMII) 1 8 1.0 Gbit/s 125 MB/s
Reduced gigabit/s MII (RGMII) 1 4 1.0 Gbit/s 125 MB/s
Ten-bit interface (TBI) 1 10 1.0 Gbit/s 125 MB/s
Serial gigabit/s MII (SGMII) 1 1 8b/10b 1.25 Gbit/s 1.0 Gbit/s 125 MB/s
Reduced serial gigabit/s MII (RSGMII) 2 1 8b/10b 2.5 Gbit/s 2.0 Gbit/s 250 MB/s
Reduced serial gigabit/s MII plus (RSGMII-PLUS) 4 1 8b/10b 5.0 Gbit/s 4.0 Gbit/s 500 MB/s
Quad serial gigabit/s MII (QSGMII) 4 1 8b/10b 5.0 Gbit/s 4.0 Gbit/s 500 MB/s
10 gigabit/s MII (XGMII) 1 32 10.0 Gbit/s 1.25 GB/s
XGMII attachment unit interface (XAUI) 1 4 8b/10b 3.125 Gbit/s 10.0 Gbit/s 1.25 GB/s
Reduced Pin XAUI (RXAUI) 1 2 8b/10b 6.25 Gbit/s 10.0 Gbit/s 1.25 GB/s
XFI/SFI 1 1 64b/66b 10.3125 Gbit/s 10.0 Gbit/s 1.25 GB/s
40 gigabit/s MII (XLGMII, on-chip only) 1 40.0 Gbit/s 5 GB/s
100 gigabit/s MII (CGMII, on-chip only) 1 100.0 Gbit/s 12.5 GB/s 2008
100G AUI (CAUI-10) 1 10 64b/66b 10.3125 Gbit/s 100.0 Gbit/s 12.5 GB/s
100G AUI (CAUI-4) 1 4 64b/66b 25.78125 Gbit/s 100.0 Gbit/s 12.5 GB/s

PHY to XPDR

edit
Technology Rate Year
10 gigabit/s 16-bit interface (XSBI; 16 lanes) 0.995 Gbit/s 0.124 GB/s

Dynamic random-access memory

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The table below shows values for PC memory module types. These modules usually combine multiple chips on one circuit board. SIMM modules connect to the computer via an 8-bit- or 32-bit-wide interface. RIMM modules used by RDRAM are 16-bit- or 32-bit-wide.[49] DIMM modules connect to the computer via a 64-bit-wide interface. Some other computer architectures use different modules with a different bus width.

In a single-channel configuration, only one module at a time can transfer information to the CPU. In multi-channel configurations, multiple modules can transfer information to the CPU at the same time, in parallel. FPM, EDO, SDR, and RDRAM memory was not commonly installed in a dual-channel configuration. DDR and DDR2 memory is usually installed in single- or dual-channel configuration. DDR3 memory is installed in single-, dual-, tri-, and quad-channel configurations. Bit rates of multi-channel configurations are the product of the module bit-rate (given below) and the number of channels.

Module type Chip type Internal clock[a] Bus clock Bus speed[b] Transfer rate
FPM DRAM 70 ns tRAC 22 MHz 22 MHz 0.0177 GT/s 1.416 Gbit/s 177 MB/s
EDO DRAM (486 CPU) 60 ns tRAC 33 MHz 33 MHz 0.0266 GT/s 2.128 Gbit/s 266 MB/s
EDO DRAM (Pentium CPU) 60 ns tRAC 66 MHz 66 MHz 0.066 GT/s 4.264 Gbit/s 533 MB/s
PC-66 SDR SDRAM 10/15 ns 66 MHz 66 MHz 0.066 GT/s 4.264 Gbit/s 533 MB/s
PC-100 SDR SDRAM 8 ns 100 MHz 100 MHz 0.100 GT/s 6.4 Gbit/s 800 MB/s
PC-133 SDR SDRAM 7/7.5 ns 133 MHz 133 MHz 0.133 GT/s 8.528 Gbit/s 1.066 GB/s
RIMM-1200 RDRAM PC600 75 MHz 300 MHz 0.600 GT/s 9.6 Gbit/s 1.2 GB/s
RIMM-1400 RDRAM PC700 87.5 MHz 350 MHz 0.700 GT/s 11.2 Gbit/s 1.4 GB/s
RIMM-1600 RDRAM PC800 100 MHz 400 MHz 0.800 GT/s 12.8 Gbit/s 1.6 GB/s
PC-1600 DDR SDRAM DDR-200 100 MHz 100 MHz 0.200 GT/s 12.8 Gbit/s 1.6 GB/s
RIMM-2100 RDRAM PC1066 133 MHz 533 MHz 1.066 GT/s 17.034 Gbit/s 2.133 GB/s
PC-2100 DDR SDRAM DDR-266 133 MHz 133 MHz 0.266 GT/s 17.034 Gbit/s 2.133 GB/s
RIMM-2400 RDRAM PC1200 150 MHz 600 MHz 1.2 GT/s 19.2 Gbit/s 2.4 GB/s
PC-2700 DDR SDRAM DDR-333 166 MHz 166 MHz 0.333 GT/s 21.336 Gbit/s 2.667 GB/s
PC-3200 DDR SDRAM DDR-400 200 MHz 200 MHz 0.400 GT/s 25.6 Gbit/s 3.2 GB/s
PC2-3200 DDR2 SDRAM DDR2-400 100 MHz 200 MHz 0.400 GT/s 25.6 Gbit/s 3.2 GB/s
PC-3500 DDR SDRAM DDR-433 216 MHz 216 MHz 0.433 GT/s 27.728 Gbit/s 3.466 GB/s
PC-3700 DDR SDRAM DDR-466 233 MHz 233 MHz 0.466 GT/s 29.864 Gbit/s 3.733 GB/s
PC-4000 DDR SDRAM DDR-500 250 MHz 250 MHz 0.500 GT/s 32 Gbit/s 4 GB/s
PC-4200 DDR SDRAM DDR-533 266 MHz 266 MHz 0.533 GT/s 34.128 Gbit/s 4.266 GB/s
PC2-4200 DDR2 SDRAM DDR2-533 133 MHz 266 MHz 0.533 GT/s 34.128 Gbit/s 4.266 GB/s
PC-4400 DDR SDRAM DDR-550 275 MHz 275 MHz 0.550 GT/s 35.2 Gbit/s 4.4 GB/s
PC-4800 DDR SDRAM DDR-600 300 MHz 300 MHz 0.600 GT/s 38.4 Gbit/s 4.8 GB/s
PC2-5300 DDR2 SDRAM DDR2-667 166 MHz 333 MHz 0.667 GT/s 42.664 Gbit/s 5.333 GB/s
PC2-6000 DDR2 SDRAM DDR2-750 188 MHz 375 MHz 0.750 GT/s 48 Gbit/s 6 GB/s
PC2-6400 DDR2 SDRAM DDR2-800 200 MHz 400 MHz 0.800 GT/s 51.2 Gbit/s 6.4 GB/s
PC3-6400 DDR3 SDRAM DDR3-800 100 MHz 400 MHz 0.800 GT/s 51.2 Gbit/s 6.4 GB/s
PC2-7200 DDR2 SDRAM DDR2-900 225 MHz 450 MHz 0.900 GT/s 57.6 Gbit/s 7.2 GB/s
PC2-8000 DDR2 SDRAM DDR2-1000 250 MHz 500 MHz 1 GT/s 64 Gbit/s 8 GB/s
PC2-8500 DDR2 SDRAM DDR2-1066 266 MHz 533 MHz 1.066 GT/s 68 Gbit/s 8.5 GB/s
PC3-8500 DDR3 SDRAM DDR3-1066 133 MHz 533 MHz 1.066 GT/s 68 Gbit/s 8.5 GB/s
PC2-8800 DDR2 SDRAM DDR2-1100 275 MHz 550 MHz 1.1 GT/s 70.4 Gbit/s 8.8 GB/s
PC2-9200 DDR2 SDRAM DDR2-1150 288 MHz 575 MHz 1.15 GT/s 73.6 Gbit/s 9.2 GB/s
PC2-9600 DDR2 SDRAM DDR2-1200 300 MHz 600 MHz 1.2 GT/s 76.8 Gbit/s 9.6 GB/s
PC2-10000 DDR2 SDRAM DDR2-1250 312 MHz 625 MHz 1.25 GT/s 80 Gbit/s 10 GB/s
PC3-10600 DDR3 SDRAM DDR3-1333 167 MHz 667 MHz 1.333 GT/s 85.336 Gbit/s 10.667 GB/s
PC3-11000 DDR3 SDRAM DDR3-1375 172 MHz 688 MHz 1.375 GT/s 88 Gbit/s 11 GB/s
PC3-12800 DDR3 SDRAM DDR3-1600 200 MHz 800 MHz 1.6 GT/s 102.4 Gbit/s 12.8 GB/s
PC3-13000 DDR3 SDRAM DDR3-1625 203 MHz 813 MHz 1.625 GT/s 104 Gbit/s 13 GB/s
PC3-14400 DDR3 SDRAM DDR3-1800 225 MHz 900 MHz 1.8 GT/s 115.2 Gbit/s 14.4 GB/s
PC3-14900 DDR3 SDRAM DDR3-1866 233 MHz 933 MHz 1.866 GT/s 119.464 Gbit/s 14.933 GB/s
PC3-16000 DDR3 SDRAM DDR3-2000 250 MHz 1000 MHz 2 GT/s 128 Gbit/s 16 GB/s
PC3-17000 DDR3 SDRAM DDR3-2133 267 MHz 1067 MHz 2.133 GT/s 136.528 Gbit/s 17.066 GB/s
PC4-17000 DDR4 SDRAM DDR4-2133 267 MHz 1067 MHz 2.133 GT/s 136.5 Gbit/s 17 GB/s
PC3-17600 DDR3 SDRAM DDR3-2200 275 MHz 1100 MHz 2.2 GT/s 140.8 Gbit/s 17.6 GB/s
PC3-19200 DDR3 SDRAM DDR3-2400 300 MHz 1200 MHz 2.4 GT/s 153.6 Gbit/s 19.2 GB/s
PC4-19200 DDR4 SDRAM DDR4-2400 300 MHz 1200 MHz 2.4 GT/s 153.6 Gbit/s 19.2 GB/s
PC3-21300 DDR3 SDRAM DDR3-2666 333 MHz 1333 MHz 2.666 GT/s 170.5 Gbit/s 21.3 GB/s
PC4-21300 DDR4 SDRAM DDR4-2666 333 MHz 1333 MHz 2.666 GT/s 170.5 Gbit/s 21.3 GB/s
PC3-24000 DDR3 SDRAM DDR3-3000 375 MHz 1500 MHz 3.0 GT/s 192 Gbit/s 24 GB/s
PC4-24000 DDR4 SDRAM DDR4-3000 375 MHz 1500 MHz 3.0 GT/s 192 Gbit/s 24 GB/s
PC4-25600 DDR4 SDRAM DDR4-3200 400 MHz 1600 MHz 3.2 GT/s 204.8 Gbit/s 25.6 GB/s
PC5-41600 DDR5 SDRAM DDR5-5200 650 MHz 2600 MHz 5.2 GT/s 332.8 Gbit/s 41.6 GB/s
PC5-44800 DDR5 SDRAM DDR5-5600 700 MHz 2800 MHz 5.6 GT/s 358.4 Gbit/s 44.8 GB/s
PC5-51200 DDR5 SDRAM DDR5-6400 800 MHz 3200 MHz 6.4 GT/s 409.6 Gbit/s 51.2 GB/s
PC5-57600 DDR5 SDRAM DDR5-7200 900 MHz 3600 MHz 7.2 GT/s 460.8 Gbit/s 57.6 GB/s
PC5-64000 DDR5 SDRAM DDR5-8000 1000 MHz 4000 MHz 8.0 GT/s 512.0 Gbit/s 64.0 GB/s
PC5-70400 DDR5 SDRAM DDR5-8800 1100 MHz 4400 MHz 8.8 GT/s 563.2 Gbit/s 70.4 GB/s

a The clock rate at which DRAM memory cells operate. The memory latency is largely determined by this rate. Note that until the introduction of DDR4 the internal clock rate saw relatively slow progress. DDR/DDR2/DDR3 memory uses 2n/4n/8n (respectively) prefetch buffer to provide higher throughput, while the internal memory speed remains similar to that of the previous generation.

b The memory speed or clock rate advertised by manufactures and suppliers usually refers to this rate (with 1 GT/s = 1 GHz). Note that modern types of memory use DDR bus with two transfers per clock.

Graphics processing units' RAM

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RAM memory modules are also utilised by graphics processing units; however, memory modules for those differ somewhat from standard computer memory, particularly with lower power requirements, and are specialised to serve GPUs: for example, GDDR3 was fundamentally based on DDR2. Every graphics memory chip is directly connected to the GPU (point-to-point). The total GPU memory bus width varies with the number of memory chips and the number of lanes per chip. For example, GDDR5 specifies either 16 or 32 lanes per device (chip), while GDDR5X specifies 64 lanes per chip. Over the years, bus widths rose from 64-bit to 512-bit and beyond: e.g. HBM is 1024 bits wide.[50] Because of this variability, graphics memory speeds are sometimes compared per pin. For direct comparison to the values for 64-bit modules shown above, video RAM is compared here in 64-lane lots, corresponding to two chips for those devices with 32-bit widths. In 2012, high-end GPUs used 8 or even 12 chips with 32 lanes each, for a total memory bus width of 256 or 384 bits. Combined with a transfer rate per pin of 5 GT/s or more, such cards could reach 240 GB/s or more.

RAM frequencies used for a given chip technology vary greatly. Where single values are given below, they are examples from high-end cards.[51] Since many cards have more than one pair of chips, the total bandwidth is correspondingly higher. For example, high-end cards often have eight chips, each 32 bits wide, so the total bandwidth for such cards is four times the value given below.

Chip type Module type Memory clock Transfers/s Bandwidth
DDR 64 lanes 350 MHz 0.7 GT/s 44.8 Gbit/s 5.6 GB/s
DDR2 64 lanes 250 MHz 1 GT/s 64 Gbit/s 8 GB/s
GDDR3 64 lanes 625 MHz 2.5 GT/s 159 Gbit/s 19.9 GB/s
GDDR4 64 lanes 275 MHz 2.2 GT/s 140.8 Gbit/s 17.6 GB/s
GDDR5[52] 64 lanes 625–1125 MHz 5–9 GT/s 320–576 Gbit/s 40–72 GB/s
GDDR5X[53] 64 lanes 625–875 MHz 10–12 GT/s 640–768 Gbit/s 80–96 GB/s
GDDR6 64 lanes 875–1125 MHz 14–18 GT/s 896–1152 Gbit/s 112–144 GB/s
GDDR6X[54] 64 lanes 594–656 MHz 19–21 GT/s 1216–1344 Gbit/s 152–168 GB/s
HBM[55] 1024 lanes (8 channels @ 128 lanes ea) 500 MHz 1 GT/s 1024 Gbit/s 128 GB/s
HBM2[55] 1024 lanes (8 channels @ 128 lanes ea) 1000 MHz 2 GT/s 2048 Gbit/s 256 GB/s
HBM2e[56] 1024 lanes (8 channels @ 128 lanes ea) 1800 MHz 3.6 GT/s 3686.4 Gbit/s 460.8 GB/s
HBM3[56][57] 1024 lanes (16 channels @ 64 lanes ea) 3200 MHz 6.4 GT/s 6553.6 Gbit/s 819.2 GB/s
HMC 128 lanes (8 links @ 16 lanes ea) (internal) 10 GT/s 2560 Gbit/s 320 GB/s
HMC2 64 lanes (4 links @ 16 lanes ea) (internal) 30 GT/s 3840 Gbit/s 480 GB/s
HBM3E[56][57] 1024 lanes (16 channels @ 64 lanes ea) up to 4900 MHz up to 9.8 GT/s up to 10035 Gbit/s up to 1.25 TB/s

Digital audio

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Device Rate
CD Audio (16-bit PCM) 1.411 Mbit/s 176.4 kB/s
I²S 2.250 Mbit/s @ 24bit/48 kHz 0.281 MB/s
AES/EBU 2.625 Mbit/s @ 24-bit/48 kHz 0.328 MB/s
S/PDIF fs 48kHz 3.072 Mbit/s 0.384 MB/s
ADAT Lightpipe (Type I) 9.216 Mbit/s 1.152 MB/s
AC'97 12.288 Mbit/s 1.536 MB/s
HDMI 36.864 Mbit/s 4.608 MB/s
DisplayPort 36.864 Mbit/s 4.608 MB/s
Intel High Definition Audio rev. 1.0[58] 48 Mbit/s outbound; 24 Mbit/s inbound 6 MB/s outbound; 3 MB/s inbound
MADI 100 Mbit/s 12.5 MB/s

Digital video interconnects

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Data rates given are from the video source (e.g., video card) to receiving device (e.g., monitor) only. Out of band and reverse signaling channels are not included.

Device Rate Year
HD-SDI (SMPTE 292M) 1.485 Gbit/s 0.186 GB/s
Camera Link Base (single) 24-bit 85 MHz 2.040 Gbit/s 0.255 GB/s
LVDS Display Interface[59] 2.80 Gbit/s 0.35 GB/s
3G-SDI (SMPTE 424M) 2.97 Gbit/s 0.371 GB/s 2006
Single link DVI 4.95 Gbit/s 0.619 GB/s [a] 1999
HDMI 1.0[60] 4.95 Gbit/s 0.619 GB/s [a] 2002
Camera Link full (dual) 64-bit 85 MHz 5.44 Gbit/s 0.680 GB/s
6G-SDI (SMPTE 2081) 5.94 Gbit/s 0.75 GB/s 2015
DisplayPort 1.0 (4-lane Reduced Bit Rate)[61] 6.48 Gbit/s 0.810 GB/s [a] 2006
Dual link DVI 9.90 Gbit/s 1.238 GB/s [a] 1999
Thunderbolt 2 × 10 Gbit/s 2 × 1.25 GB/s 2011
HDMI 1.3[62] 10.2 Gbit/s 1.275 GB/s [a] 2006
Dual High-Speed LVDS Display Interface 10.5 Gbit/s 1.312 GB/s
DisplayPort 1.0 (4-lane High Bit Rate)[61] 10.8 Gbit/s 1.35 GB/s [a] 2006
12G-SDI (SMPTE 2082) 11.88 Gbit/s 1.5 GB/s 2015
HDMI 2.0[63] 18.0 Gbit/s 2.25 GB/s [a] 2013
Thunderbolt 2 20 Gbit/s 2.5 GB/s 2013
DisplayPort 1.2 (4-lane High Bit Rate 2)[61] 21.6 Gbit/s 2.7 GB/s [a] 2009
DisplayPort 1.3 (4-lane High Bit Rate 3) 32.4 Gbit/s 4.05 GB/s [a] 2014 (2016)
DisplayPort 1.4/1.4a 32.4 Gbit/s 4.05 GB/s 2016 (2018)
superMHL 36 Gbit/s 4.5 GB/s 2015
Thunderbolt 3 40 Gbit/s 5 GB/s 2015
HDMI 2.1[64] 48 Gbit/s 6 GB/s [b] 2017
DisplayPort 2.0/2.1 (4-lane)[65] 80 Gbit/s 10 GB/s [c] 2019 (2022)
SMPTE 2110 over 100 Gigabit Ethernet 100 Gbit/s 12.5 GB/s 2017

a Uses 8b/10b encoding (20% coding overhead) b Uses 16b/18b encoding (11% overhead) c Uses 128b/132b encoding (3% overhead)

See also

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Notes

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  1. ^ Morse can transport 26 alphabetic, 10 numeric and one interword gap plaintext symbols. Transmitting 37 different symbols requires 5.21 bits of information (25.21 = 37). A skilled operator encoding the benchmark "PARIS" plus an interword gap (equal to 31.26 bits) at 40 wpm is operating at an equivalence of 20.84 bit/s.
  2. ^ WPM, or words per minute, is the number of times the word "PARIS" is transferred per minute. Strictly speaking the code is quinary, accounting inter-element, inter-letter, and inter-word gaps, yielding 50 binary elements (bits) per one word. Counting characters, including inter-word gaps, gives six characters per word or 240 characters per minute, and finally four characters per second.
  3. ^ a b c d e f g h i j All modems are wrongly assumed to be in serial operation with 1 start bit, 8 data bits, no parity, and 1 stop bit (2 stop bits for 110-baud modems). Therefore, currently modems are wrongly calculated with transmission of 10 bits per 8-bit byte (11 bits for 110-baud modems). Although the serial port is nearly always used to connect a modem and has equivalent data rates, the protocols, modulations and error correction differ completely.
  4. ^ a b c 56K modems: V.90 and V.92 have just 5% overhead for the protocol signalling. The maximum capacity can only be achieved when the upstream (service provider) end of the connection is digital, i.e. a DS0 channel.
  5. ^ Effective aggregate bandwidth for an ISDN installation is typically higher than the rates shown for a single channel due to the use of multiple channels. A basic rate interface (BRI) provides two "B" channels and one "D" channel. Each B channel provides 64 kbit/s bandwidth and the "D" channel carries signaling (call setup) information. B channels can be bonded to provide a 128 kbit/s data rate. Primary rate interfaces (PRI) vary depending on whether the region uses E1 (Europe, world) or T1 (North America) bearers. In E1 regions, the PRI carries 30 B-channels and one D-channel; in T1 regions the PRI carries 23 B-channels and one D-channel. The D-channel has different bandwidth on the two interfaces.
  6. ^ Most operators only support up to 9600 bit/s
  7. ^ SDSL is available in various speeds.
  8. ^ ADSL connections will vary in throughput from 64 kbit/s to several Mbit/s depending on configuration. Most are commonly below 2 Mbit/s. Some ADSL and SDSL connections have a higher digital bandwidth than T1 but their rate is not guaranteed, and will drop when the system gets overloaded, whereas the T1 type connections are usually guaranteed and have no contention ratios.
  9. ^ ons exist where all the downstream traffic is handled by satellite and the upstream traffic by land-based connections such as 56K modems and ISDN.
  10. ^ FireWire natively supports TCP/IP, and is often used at an alternative to Ethernet when connecting 2 nodes.[21]
  11. ^ Data rate comparison between FW and Giganet shows that FW's lower overhead has nearly the same throughput as Giganet.[22]
  12. ^ a b c d Note that PCI Express 1.0/2.0 lanes use an 8b/10b encoding scheme.
  13. ^ a b c PCIe 2.0 effectively doubles the bus standard's bandwidth from 2.5 GT/s to 5 GT/s
  14. ^ a b c d e f PCIe 3.0 increases the bandwidth from 5 GT/s to 8 GT/s and switches to 128b-130b encoding
  15. ^ SCSI-1, SCSI-2 and SCSI-3 are signaling protocols and do not explicitly refer to a specific rate. Narrow SCSI exists using SCSI-1 and SCSI-2. Higher rates use SCSI-2 or later.
  16. ^ Minimum overhead is 38 byte L1/L2, 14 byte AoE per 1024 byte user data
  17. ^ Minimum overhead is 38 byte L1/L2, 20 byte IP, 20 byte TCP per 1460 byte user data
  18. ^ a b c d e f Fibre Channel 1GFC, 2GFC, 4GFC use an 8b/10b encoding scheme. Fibre Channel 10GFC, which uses a 64B/66B encoding scheme, is not compatible with 1GFC, 2GFC and 4GFC, and is used only to interconnect switches.
  19. ^ a b Minimum overhead is 38 byte L1/L2, 14 byte AoE per 8192 byte user data
  20. ^ a b c Minimum overhead is 38 byte L1/L2, 20 byte IP, 20 byte TCP per 8960 byte user data
  21. ^ a b c d e f SATA and SAS use an 8b/10b encoding scheme.
  22. ^ a b minimum overhead is 38 byte L1/L2, 36 byte FC per 2048 byte user data
  23. ^ Proprietary serial version of IEEE-488 by Commodore International

References

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  1. ^ John Lowe (September 2012), Enhanced WWVB Broadcast Format (PDF)
  2. ^ WWVB Radio Controlled Clocks: Recommended Practices for Manufacturers and Consumers (2009 Edition) (PDF), archived from the original (PDF) on 2016-12-21
  3. ^ TTY uses a Baudot code, not ASCII. This uses 5 bits per character instead of 8, plus one start and approx. 1.5 stop bits (7.5 total bits per character sent).
  4. ^ "ITU-T Recommendation database".
  5. ^ "A Brief History of Captioned Television". www.ncicap.org. Archived from the original on 19 July 2011.
  6. ^ "Human Speech May Have a Universal Transmission Rate: 39 Bits Per Second". science.org. 2019-09-04. Retrieved 2022-06-24.
  7. ^ a b Modem Types and Timeline, Daxal Communications, 2003-12-16, archived from the original on 2008-10-08, retrieved 2009-04-16
  8. ^ a b c d e f g "ITU-T Recommendations: V Series: Data communication over the telephone network". ITU.
  9. ^ Massey, David (2006-07-04), "Timeline of Telecommunications", Telephone Tribute, retrieved 2009-04-16
  10. ^ Adam.com.au
  11. ^ "Recommendation G.991.1 (10/98)". ITU.
  12. ^ a b DOCSIS 1.0 Archived 2006-06-13 at the Wayback Machine includes technology which first became available around 1995–1996, and has since become very widely deployed. DOCSIS 1.1 Archived 2006-06-13 at the Wayback Machine introduces some security improvements and quality of service (QoS).
  13. ^ a b DOCSIS 2.0 Archived 2009-09-04 at the Wayback Machine specifications provide increased upstream throughput for symmetric services.
  14. ^ "G.983.2". ITU.
  15. ^ a b DOCSIS 3.0 Archived 2006-06-19 at the Wayback Machine includes support for channel bonding and IPv6.
  16. ^ "G.984.4 : Gigabit-capable passive optical networks (G-PON)". ITU.
  17. ^ DOCSIS 3.1 Archived 2015-03-13 at the Wayback Machine is currently in development by the Cablelabs Consortium
  18. ^ "G.987 : 10-Gigabit-capable passive optical network (XG-PON) systems". ITU.
  19. ^ "G.989 : 40-Gigabit-capable passive optical networks (NG-PON2)". ITU.
  20. ^ a b "MoCA 1.1 improves throughput" over coaxial cable to 175 Mbits/s versus the 100 Mbits/s provided by the MoCA 1.0 specification.
  21. ^ Tweaktown.com
  22. ^ Unibrain.com Archived 2008-02-07 at the Wayback Machine
  23. ^ a b c d e f g h i j k l m InfiniBand SDR, DDR and QDR use an 8b/10b encoding scheme.
  24. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab InfiniBand FDR-10, FDR and EDR use a 64b/66b encoding scheme.
  25. ^ a b c d Lee, Bill. "Chair of marketing working group". IBTA Blog. IBTA. Archived from the original on 2018-06-25. Retrieved 25 June 2018.
  26. ^ Mac History
  27. ^ VAW: Apple IIgs Specs Archived 2011-01-10 at the Wayback Machine
  28. ^ "After 35 years of I2C, I3C Improves Capability and Performance | Sensors and MEMS". eecatalog.com. Retrieved 2019-06-26.
  29. ^ The Zorro II bus use 4 clocks per 16-Bit of data transferred. See the Zorro III technical specification Archived 2012-07-16 at the Wayback Machine for more information.
  30. ^ Japan wikipedia article, Bus used in early NEC PC-9800 series and compatible systems
  31. ^ STD 32 Bus Specification and Designer's Guide
  32. ^ Japan wikipedia article, Bus used in later NEC PC-9800 series and compatible systems
  33. ^ RISC System/6000 POWERstation/POWERserver 580
  34. ^ Local Area Networks Newsletter by Paul Polishuk, September 1992, Page 7 (APbus used in Sony NeWS and NEC UP4800 workstations and NEC EWS4800 servers after VMEbus and before switch to PCI)
  35. ^ Japan wikipedia article, Bus used in NEC PC-9821 series
  36. ^ Dave Haynie, designer of the Zorro III bus, claims in this posting that the theoretical max of the Zorro III bus can be derived by the timing information given in chapter 5 of the Zorro III technical specification Archived 2012-07-16 at the Wayback Machine.
  37. ^ Dave Haynie, designer of the Zorro III bus, states in this posting that Zorro III is an asynchronous bus and therefore does not have a classical MHz rating. A maximum theoretical MHz value may be derived by examining timing constraints detailed in the Zorro III technical specification Archived 2012-07-16 at the Wayback Machine, which should yield about 37.5 MHz. No existing implementation performs to this level.
  38. ^ Dave Haynie, designer of the Zorro III bus, claims in this posting that Zorro III has a max burst rate of 150 MB/s.
  39. ^ Born, Eric (8 June 2017). "PCIe 4.0 specification finally out with 16 GT/s on tap". Tech Report. Retrieved 21 February 2018.
  40. ^ Smith, Ryan. "PCI-SIG Finalizes PCIe 5.0 Specification: x16 Slots to Reach 64GB/sec". www.anandtech.com. Retrieved 2019-06-26.
  41. ^ "PCI Express 6.0 Specification Finalized: X16 Slots to Reach 128GBps".
  42. ^ Intel LPC Interface Specification 1.1
  43. ^ "CCOM - Diskettenlaufwerke und Festplatten".
  44. ^ a b c FireWire (IEEE 1394b) uses an 8b/10b encoding scheme.
  45. ^ Dent, Steve (26 July 2017). "USB 3.2 doubles your connection speeds with the same port". Engadget. Retrieved 26 July 2017.
  46. ^ "VITA - Online store product". www.vita.com. Retrieved 2022-03-23.
  47. ^ Shilov, Anton. "USB4 Specification Announced: Adopting Thunderbolt 3 Protocol for 40 Gbps USB". www.anandtech.com. Retrieved 2019-06-26.
  48. ^ "USB Promoter Group Announces USB4® Version 2.0". www.businesswire.com (Press release). September 2022. Retrieved 2022-09-01.
  49. ^ "RDRAM Memory Architecture".
  50. ^ Comparison of AMD graphics processing units
  51. ^ Comparison of Nvidia graphics processing units
  52. ^ "GRAPHICS DOUBLE DATA RATE (GDDR5) SGRAM STANDARD JESD212C". JEDEC. 2016-02-01. Retrieved 2016-08-10.
  53. ^ "GRAPHICS DOUBLE DATA RATE (GDDR5X) SGRAM STANDARD JESD232". JEDEC. 2015-11-01. Retrieved 2016-08-10.
  54. ^ "Doubling I/O Performance with PAM4 - Micron Innovates GDDR6X to Accelerate Graphics Memory". Micron. Retrieved 11 September 2020.
  55. ^ a b Shilov, Anton (20 January 2016). "JEDEC Publishes HBM2 Specification". Anandtech. Retrieved 16 May 2017.
  56. ^ a b c Harding, Scharon (15 April 2021). "What Are HBM, HBM2 and HBM2E? A Basic Definition". Tom's Hardware. Retrieved 4 May 2022.
  57. ^ a b Prickett Morgan, Timothy (6 April 2022). "The HBM3 roadmap is just getting started". TheNextPlatform. Retrieved 4 May 2022.
  58. ^ High Definition Audio Specification, Revision 1.0a, 2010
  59. ^ Videsignline.com, Panel display interfaces and bandwidth: From TTL, LVDS, TDMS to DisplayPort
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  61. ^ a b c Displayport Technical Overview Archived 2011-07-26 at the Wayback Machine, May 2010
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  63. ^ "HDMI.org". Archived from the original on 2019-01-05. Retrieved 2013-11-07.
  64. ^ "HDMI.org". Archived from the original on 2017-01-06. Retrieved 2017-01-10.
  65. ^ "VESA Releases DisplayPort 2.1 Specification". 17 October 2022. Archived from the original on 2022-11-23. Retrieved 2023-01-19.
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