User Guide for FS models including: OSFP-SR8-800G, OSFP-SR8-800G Transceiver Module, Transceiver Module, Module
OSFP-SR8-800G Transceiver Module | FS
FS
OSFP-SR8-800G Transceiver Module | FS
OSFP-SR8-800G Transceiver Module
2 apr 2025 — The FS OSFP-SR8-800G is an 800Gb/s 2x400Gb/s Twin-port OSFP transceiver that supports InfiniBand or. Ethernet protocols. This SR8 multimode, parallel, ...
OSFP-SR8-800G Transceiver Module
Connectivity Guide
V1.0.253A
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Contents
1. Overview
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2. Key Features
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3. Applications
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4. Connectivity Scenarios
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5. Use cases
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5.1 Switch-to-switch at 800Gb/s
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5.2 Switch-to-two combinations of 400G ConnectX-7 and/or BlueField-3 7
5.3 Switch-to-four combinations of 200G ConnectX-7 and/or BlueField-3 8
5.4 Switch-to-DGX H100 GPU Systems
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6. Ordering Information
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Overview
1. Overview
The FS OSFP-SR8-800G is an 800Gb/s 2x400Gb/s Twin-port OSFP transceiver that supports InfiniBand or Ethernet protocols. This SR8 multimode, parallel, 8-channel transceiver uses two, 4-channel MPO-12/APC optical connectors at 400Gb/s each. The parallel multimode, short reach 8-channel (2xSR4) uses 100G-PAM4 modulation and has a maximum fiber reach of 50-meters using 8 multimode fibers. The 50-meter length assumes two optical patch panels in the link. The OSFP-SR8-800G transceiver features a finned heatsink design and is usually used in Quantum-2 InfiniBand or Ethernet air-cooled switches. The transceiver combinations guarantee optimal operation in InfiniBand or Ethernet end-to-end systems and customer networking solutions. Rigorous production testing ensures the best out-of the-box installation experience, performance, and durability.
· Note: Images are for reference only. Product labels, colors and sizes may vary.
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Key Features
2. Key Features
· InfiniBand or Ethernet · 800G 2xSR4/SR8 multimode transceiver · 8x 100G-PAM4 Electrical to Dual 4x 100G-PAM4 optical Parallel · Support 800G-to-two 400G ConnectX-7 links or 800G-to-four 200G ConnectX-7 links · Finned-Top OSFP used in Quantum-2 or Ethernet air-cooled switches · Maximum reach: 30m using OM3 fiber, 50m using OM4 fiber · Dual MPO-12/APC optical connector · 850nm VCSEL · 16 W max power · Single 3.3V power supply · Class 1 laser safety · CMIS 5.1 compliant · Hot pluggable, OSFP MSA and RoHS compliant · Commercial temperature range 0 to +70°C (32 to 158°F)
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Applications & Connectivity Scenarios
3. Applications
FS OSFP-SR8-800G is designed to maximize the performance of HPC networks, requiring high-bandwidth, low-latency, highly reliable connections between InfiniBand or Ethernet elements. It can link upward in NVIDIA Quantum or Ethernet architectures for switch-to-switch applications, downward for top-of-rack switch links to ConnectX® smart network adapters, and to BlueField® DPUs in compute servers and storage subsystems.
4. Connectivity Scenarios
The twin-ports enable several unique configurations to connect switches to switches, ConnectX-7 adapters, and BlueField-3 DPUs. The twin port OSFP uses two, 4-channel MPO-12/APC optical connectors with two 4-channel fiber cables. These can link to a single port 400G OSFP or QSFP112 transceivers used in ConnectX-7 adapters and/or BlueField-3 DPUs. The electronics, optics and optical connectors are the same for both single port OSFP and QSFP112. Both ConnectX-7 and BlueField-3 devices can be used with twin port OSFP transceivers at the same time with their respective form-factor type. · Twin-port multimode OSFP transceivers remain at 16 W for all configurations linking OSFP switches, OSFP
and QSFP112 adapters, and DPUs simultaneously. · Linking twin-port transceivers with 1:2 fiber splitter cables to 400G transceivers automatically creates
200Gb/s transceivers by activating only 2-channels, and automatically reduces power consumption in the 400G OSFP transceiver from 8.5 to 5.5 W, and automatically reduces power consumption in the 400G QSFP112 transceiver from 9 to 6 W.
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Use cases
5. Use cases
All combinations of twin port 2x400G OSFP, 400G single port OSFP/QSFP112 transceivers support either InfiniBand or Ethernet protocols. The ConnectX-7 and BlueField-3 contains both InfiniBand and Ethernet protocols. InfiniBand environments require InfiniBand-compliant transceivers and switches, while Ethernet environments necessitate Ethernet-specific transceivers and switches. The use cases include: · Switch-to-switch at 800Gb/s · Switch-to-two combinations of 400G ConnectX-7 and/or BlueField-3 · Switch-to-four combinations of 200G ConnectX-7 and/or BlueField-3 · Switch-to-DGX H100 GPU Systems
5.1 Switch-to-switch at 800Gb/s
Two OSFP-based switches can be linked together at 800G (2x400GG) using two twin port OSFP transceivers and two straight, multimode fiber cables (12FMTPOM44) up to 50-meters.
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Use cases
5.2 Switch-to-two combinations of 400G ConnectX-7 and/or BlueField-3
A twin port OSFP transceiver using two, straight fiber cables can support up to two adapters and/or DPU combinations. Each of the two, 4-channel fiber cables (12FMTPOM4) can link to a 400G transceiver up to 50meters in either OSFP (OSFP-SR4-400G-FL) or QSFP112 (QSFP112-SR4-400G-FL) form-factor. The electronics, optics and optical connectors are the same for both single port OSFP and QSFP112 form-factors and OSFP power consumption is 8.5 W, QSFP112 power consumption is 9 W. · Only ConnectX-7/OSFPs supports single port OSFP. · QSFP112 form-factor is used in ConnectX-7/QSFP112s and/or BlueField- 3/QSFP112 DPUs. Any combination of ConnectX-7 and BlueField-3 using OSFP or QSFP112 can be used at the same time on twin port OSFP transceivers.
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Use cases
5.3 Switch-to-four combinations of 200G ConnectX-7 and/or BlueField-3
A twin port OSFP transceiver using two, 1:2 fiber splitter cables can support up to four adapter and/or DPU combinations. Each of the two, 4-channel 1:2 fiber splitter cables (12FMTPOM4) can link to a 400G transceiver up to 50-meters in either OSFP (OSFP-SR4-400G-FL) or QSFP112 (QSFP112-SR4-400G-FL) form-factor. The electronics, optics and optical connectors are the same for both single port OSFP and QSFP112 form factors. The two-fiber channel ends only activate two of the lanes in the 400G transceiver creating a 200G device and automatically reduces the power consumption of only the 400G OSFP transceivers from 8.5 W to 5.5 W, automatically reduces the power consumption of only the 400G QSFP112 transceivers from 9 W to 6 W. Twin port OSFP power consumption remains at 16 W. · Only ConnectX-7/OSFPs can accept single port OSFP. · QSFP112 form-factor is used in ConnectX-7/QSFP112s and/or BluieField- 3/QSFP112 DPUs. · Any combination of ConnectX-7 types and BlueField-3 can be used at the same time on twin port OSFP
transceivers.
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Use cases
5.4 Switch-to-DGX H100 GPU Systems
The DGX-H100 contains eight "Hopper" H100 GPUs in the top chassis section, two CPUs, storage, and InfiniBand and/or Ethernet networking in the bottom server section. This contains eight 400Gb/s ConnectX7 NICs mounted on two mezzanine boards called "Cedar-7" cards for GPU-to-GPU InfiniBand or Ethernet networking. The OSFP-SR8-800G-FL without heat dissipation fins is deployable in DGX H100 systems, interoperating with heatsink-equipped OSFP-SR8-800G counterparts.
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Ordering information
6. Ordering information
Table 1: Ordering Information for FS InfiniBand OSFP-SR8-800G Transceivers and Related Products.
Part number
Description
Transceivers
OSFP-SR8-800G
800GBASE OSFP Finned Top 2x SR4/SR8 850nm 50m Dual MPO-12/APC MMF
OSFP-SR8-800G-FL 800GBASE OSFP Flat Top 2x SR4/SR8 850nm 50m Dual MPO-12/APC MMF
OSFP-SR4-400G-FL 400GBASE OSFP Flat Top SR4 850nm 50m MPO-12/APC MMF
QSFP112-SR4-400G 400GBASE QSFP112 SR4 850nm 50m MPO-12/APC MMF
MQM9790-NS2F MQM9700-NS2F
Switches NVIDIA® 64-Port NDR 400G InfiniBand Data Center Switch NVIDIA® 64-Port NDR 400G InfiniBand Data Center Switch
NICs
MCX75510AAS-NEAT ConnectX®-7 InfiniBand Adapter Card 400GbE/NDR, Single-Port OSFP
MCX75310AAC-NEAT ConnectX®-7 InfiniBand & Ethernet Adapter Card 400GbE/NDR, Single-Port OSFP
MCX755106AS-HEAT
ConnectX®-7 InfiniBand & Ethernet Adapter Card 200GbE/NDR200, Dual-Port QSFP112
Cables
12FMTPOM4
MPO-12 APC (Female) to MPO-12 APC (Female), MMF, Type B
8FMTPOM4
MPO-12 APC (Female) to 2 x MPO-4 APC (Female), MMF, Type B
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Ordering information
Table 2: Ordering Information for FS Ethernet OSFP-SR8-800G Transceivers and Related Products.
Part number
Description
Transceivers
OSFP-SR8-800G
800GBASE OSFP Finned Top 2x SR4/SR8 850nm 50m Dual MPO-12/APC MMF
OSFP-SR4-400G-FL 400GBASE OSFP Flat Top SR4 850nm 50m MPO-12/APC MMF
QSFP112-SR4-400G 400GBASE QSFP112 SR4 850nm 50m MPO-12/APC MMF
N8650-32OD N9600-64OD
Switches 32-Port Ethernet HPC/AI Data Center Switch, 32 x 800Gb OSFP, PicOS® 64-Port Ethernet HPC/AI Data Center Switch, 64 x 800Gb OSFP, PicOS®
NICs
MCX75310AAC-NEAT ConnectX®-7 InfiniBand & Ethernet Adapter Card 400GbE/NDR, Single-Port OSFP
MCX755106AS-HEAT
ConnectX®-7 InfiniBand & Ethernet Adapter Card 200GbE/NDR200, Dual-Port QSFP112
Cables
12FMTPOM4
MPO-12 APC (Female) to MPO-12 APC (Female), MMF, Type B
8FMTPOM4
MPO-12 APC (Female) to 2 x MPO-4 APC (Female), MMF, Type B
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NVIDIA Mellanox MCX75510AAS-NEAT ConnectX®-7 InfiniBand Adapter Card 400GbE/NDR, Single-Port OSFP, PCIe 5.0 x 16 , Tall Bracket - FS.com Europe