Editing InfiniBand (section)

=== Performance ===
Original names for speeds were single-data rate (SDR), double-data rate (DDR) and quad-data rate (QDR) as given below.<ref name="comeback" /> Subsequently, other three-letter acronyms were added for even higher data rates.<ref name="fdr_fact_sheet">{{Cite web |date=November 11, 2021 |title=FDR InfiniBand Fact Sheet |url=https://cw.infinibandta.org/document/dl/7260 |access-date=September 30, 2021 |publisher=InfiniBand Trade Association |archive-date=August 26, 2016 |archive-url=https://web.archive.org/web/20160826064526/https://cw.infinibandta.org/document/dl/7260 |url-status=dead }}</ref>

{| class="wikitable"
|+ InfiniBand unidirectional data rates
! rowspan="2" |
! rowspan="2" |Year<ref name="ccgrid11-ib-hse-23">{{cite web |last=Panda |first=Dhabaleswar K. |author2=Sayantan Sur |date=2011 |title=Network Speed Acceleration with IB and HSE |url=http://www.ics.uci.edu/~ccgrid11/files/ccgrid11-ib-hse_last.pdf#page=23 |access-date=13 September 2014 |work=Designing Cloud and Grid Computing Systems with InfiniBand and High-Speed Ethernet |publisher=CCGrid 2011 |pages=23 |location=Newport Beach, CA, USA}}</ref>
! colspan="2" rowspan="2" |Line code
! rowspan="2" |Signaling rate (Gbit/s)
! colspan="4" |[[Throughput]] (Gbit/s)<ref name="ib_over">{{Cite web |title=InfiniBand Roadmap: IBTA - InfiniBand Trade Association |url=http://www.infinibandta.org/content/pages.php?pg=technology_overview |url-status=dead |archive-url=https://web.archive.org/web/20110929111021/http://www.infinibandta.org/content/pages.php?pg=technology_overview |archive-date=2011-09-29 |access-date=2009-10-27}}</ref>
! rowspan="2" |Adapter latency (μs)<ref>http://www.hpcadvisorycouncil.com/events/2014/swiss-workshop/presos/Day_1/1_Mellanox.pdf // Mellanox</ref>
|-
!1x
!4x
!8x
!12x
|-
!{{abbr|SDR|Single Data Rate}}
|2001, 2003
| rowspan="6" |[[Non-return-to-zero|NRZ]]
| rowspan="3" |[[8b/10b encoding|8b/10b]]<ref>{{cite web |title=InfiniBand Types and Speeds |url=https://www.advancedclustering.com/act_kb/infiniband-types-speeds/}}</ref>
|2.5
|2
|'''8'''
|16
|24
|5
|-
!{{abbr|DDR|Double data rate}}
|2005
|5
|4
|'''16'''
|32
|48
|2.5
|-
!{{abbr|QDR|Quad Data Rate}}
|2007
|10
|8
|'''32'''
|64
|96
|1.3
|-
!{{abbr|FDR10|Fourteen Data Rate, 10 Gbit/s per lane}}
|2011
| rowspan="4" |[[64b/66b encoding|64b/66b]]
|10.3125<ref>{{Cite web |title=Interfaces |url=https://docs.nvidia.com/networking/display/SB77X0EDR/Interfaces |access-date=2023-11-12 |website=NVIDIA Docs |language=en |quote=FDR10 is a non-standard InfiniBand data rate, where each lane of a 4X port runs a bit rate of 10.3125&nbsp;Gbit/s with a 64b/66b encoding, resulting in an effective bandwidth of 40&nbsp;Gbit/s. FDR10 supports 20% more bandwidth over QDR due to better encoding rate.}}</ref>
|10
|'''40'''
|80
|120
|0.7
|-
!{{abbr|FDR|Fourteen Data Rate}}
|2011
|14.0625<ref>{{Cite web |date=2018-04-29 |title=324-Port InfiniBand FDR SwitchX® Switch Platform Hardware User Manual |url=https://network.nvidia.com/pdf/user_manuals/SX6518_User_Manual.pdf |access-date=2023-11-12 |website=nVidia |at=section 1.2 |quote=InfiniBand FDR and FDR10 Overview [...] FDR, standard InfiniBand data rate, where each lane of a 4X port runs a bit rate of 14.0625&nbsp;Gbit/s with a 64b/66b encoding, resulting in an effective bandwidth of 54.54&nbsp;Gbit/s. The FDR physical layer is an IBTA specified physical layer using different block types, deskew mechanism and framing rules. The SX6518 switch also supports FDR10, a non-standard InfiniBand data rate, where each lane of a 4X port runs a bit rate of 10.3125&nbsp;Gbit/s with a 64b/66b encoding, resulting in an effective bandwidth of 40&nbsp;Gbit/s.}}</ref><ref name="fdr_fact_sheet" />
|13.64
|'''54.54'''
|109.08
|163.64
|0.7
|-
!{{abbr|EDR|Enhanced Data Rate}}
|2014<ref name="ib_roadmap">{{Cite web |title=InfiniBand Roadmap - Advancing InfiniBand |url=https://www.infinibandta.org/infiniband-roadmap/ |website=InfiniBand Trade Association |language=en-US}}</ref>
|25.78125
|25
|'''100'''
|200
|300
|0.5
|-
!{{abbr|HDR|High Data Rate}}
|2018<ref name="ib_roadmap" />
| rowspan="3" |[[Pulse-amplitude modulation|PAM4]]
|53.125<ref>{{Cite web |title=Introduction |url=https://docs.nvidia.com/networking/display/ConnectX6VPI/Introduction |access-date=2023-11-12 |website=NVIDIA Docs |language=en}}</ref>
|50
|'''200'''
|400
|600
|<0.6<ref>https://www.mellanox.com/files/doc-2020/pb-connectx-6-vpi-card.pdf {{Bare URL PDF|date=March 2022}}</ref>
|-
!{{abbr|NDR|Next Data Rate}}
|2022<ref name="ib_roadmap" />
|256b/257b{{efn-lr|Using Reed-Solomon [[forward error correction]]}}
|106.25<ref>{{Cite web |title=Introduction |url=https://docs.nvidia.com/networking/display/ConnectX7VPI/Introduction |access-date=2023-11-12 |website=NVIDIA Docs |language=en}}</ref>
|100
|'''400'''
|800
|1200
| {{dunno}}
|-
!{{abbr|XDR|Extended Data Rate}}
|2024<ref>{{Cite web |title=NVIDIA Announces New Switches Optimized for Trillion-Parameter GPU Computing and AI Infrastructure |url=http://nvidianews.nvidia.com/news/networking-switches-gpu-computing-ai |access-date=2024-03-19 |website=NVIDIA Newsroom |language=en-us}}</ref>
| rowspan="2" | {{TBD}}
|200
|200
|'''800'''
|1600
|2400
| rowspan="2" | {{TBD}}
|-
!{{abbr|GDR|t.b.d. Data Rate}}
|{{TBA}}
|{{TBD}}
|400
|400
|'''1600'''
|3200
|4800
|}
; Notes
{{Notelist-lr}}

Each link is duplex. Links can be aggregated: most systems use a 4 link/lane connector (QSFP). HDR often makes use of 2x links (aka HDR100, 100&nbsp;Gb link using 2 lanes of HDR, while still using a QSFP connector). 8x is called for with NDR switch ports using OSFP (Octal Small Form Factor Pluggable) connectors {{Cite web |url=https://docs.nvidia.com/networking/display/cablemanagfaq/cable+and+connector+definitions|title=Cable and Connector Definitions | language=en-US}}

InfiniBand provides [[remote direct memory access]] (RDMA) capabilities for low CPU overhead.