Overview
800Gb/s XDR Twin-port OSFP and OSFP Transceivers and Fiber Part Numbers based on 200G-PAM4 Modulation for InfiniBand
The XDR InfiniBand four-channel 200G-PAM4 cable and transceiver product line consists of linear active copper cables (LACC), single-mode transceivers and optical fiber cables.
2x800G-to-2x800G links for switch-to-switch
2x800G-to-two 400G links to ConnectX-8 (PCIe and mezzanine cards)
2x800G-to-four 200G links to ConnectX-8 (PCIe and mezzanine cards)
Important notes:
The same single mode, straight and 1:2 splitter crossover fiber cables are used for both XDR and NDR/400GbE.
New OSFP metal connector terminologies: IHS and RHS.
Integrated Heat Sink (IHS) integrates the cooling fins into the transceiver plug tops for extra cooling (aka finned top).
Two IHS versions:
Open-top IHS (exposed cooling fins)
Closed-top IHS (fins have a metal plate on top for extra cooling)
IHS transceivers or copper cables are only used in air-cooled switches (Q3400, Q3200) – everything else uses RHS.
Riding Heat Sink (RHS) on top of ConnectX-8 card cage is called RHS, but the name applies to the OSFP plug (aka flat top).
RHS devices are used in ConnectX-8 cages for B300, GB300, ConnectX-8 PCIe cards, and liquid cooled switches.
Twin-port OSFP RHS connectors also may be referred to as “-FLT” in the legacy part numbers.
Note, there are tiny fins on the MPO end of the transceiver – this is still RHS device.
Twin-port OSFP transceivers must use the same fiber type (straight or splitter) in both optical ports and not one of each.
Not used for XDR:
QSFP112 devices, plug used in ConnectX-7/QSFP112 and BlueField-3/QSFP112 DPUs. QSFP112 is only for 100G-PAM4.
Multimode transceivers, active optical cables (AOC). (Lasers not available yet)
Direct attach copper (DAC) cables (too short at 200G-PAM4)
200G-PAM4-based transceivers cannot downshift to 100G-PAM4 or 50G-PAM4.
IHS and RHS transceivers or copper cables contain the same internals and can be linked to each other.
1.6Tb/s refers to the transceiver electrical end. May also be called 2x800G or 1,600G.
2x800G refers to the dual 800G, 4-channel optical ports.
Linear active copper cables (LACC) are passive direct attach copper (DAC) copper cables with a linear amplifier IC to boost the signal and extend cable length. Called active copper cables (ACC) in NDR generation.
Active electric cables (AEC) are DAC cables with DSP ICs inside for switch-to-switch links replacing LACC 1.6T-1.6T LACCs.
Q3200 XDR, InfiniBand switch supports 36 twin-port OSFP, IHS, 1.6Tb/s cables and transceivers. It consists of two Quantum-3 switch ICs inside the chassis that operate independently. The Q3200 supports backwards compatibility to the NDR (4x100G-PAM4) product line of DAC, LACC copper cables, multimode transceivers and AOCs, and single mode transceivers.
Q3400 XDR InfiniBand switch supports 72 twin-port OSFP, IHS, 1.6Tb/s cables and transceivers. It consists of four Quantum-3 switch ICs inside the chassis that operate together.
It supports “selected” backwards compatibility parts to the NDR product line of cables and transceivers.
Q3400 can only link to ConnectX-7, ConnectX-8 PCIe cards – not NDR switches or B300, GB300 mezzanine cards.
Q3400 does not support 1:2 port splitting the 4-channel MPO-12/APC ports. Q3200 does.
1:2 and 1:4 LACC splitters in the Q3400 can only link to the ConnectX-8 PCIe card – not switches, Iris8 mezzanine card in B300, GB300. They can link to all cards and switches in the Q3200 switch.
1.6T to 1.6T, 800G and AEC, LACC and Transceiver Summary
Parts List
Click on the green bold underlined part numbers to open the Product Specifications for that specific product.
See also the user guide and configuration map for configuring these transceivers in DGXs, switches, network adapters, and DPUs.
2x800G Twin-port OSFP IHS and RHS Transceivers 500m, 2km for Switch-to-Switch Applications | |||||||
Name | Form Factor | Configuration | Reach, Power | Part Number (link to product spec) | NVIDIA SKU | Crossover Cables Type-B | Notes |
2x800G 2xDR4 Single mode | Twin-port OSFP RHS 2x MPO-12/APC optical connectors | 8x200G-PAM4 electrical to Dual 4x200G-PAM4optical Parallel | 500m 33.5W | 
OSFP-IHSfor air-cooled switches 
OSFP-RHS for liquid-cooled switches |
980-9IAH1-00XM00 980-9IAH0-00XM00 | 
Multimode Straight cablesMFP7E30-Nxxx (xx = 01-to-100 meters) or 
Single mode1:2 Splitter cables(xx=01-to-50m) | IHS and RHS can link to each other. Each can link to 2 800G transceivers MMS4A20-XM800. 1:2 splitters fibers can only be used in Q3200 switch. |
2x800G 2xFR4 Single mode | Twin-port OSFP IHS 2x LC optical connector | 4x200G-PAM4 electrical to 4x200G-PAM4 optical Serial Multiplexed | 2km 33.5W |
MMS4A50-XM OSFP-IHS For air-cooled switches only |
980-9IAS0-00XM00 | 
2x LC fiber cables not supplied by NVIDIA. Two LC fiber cables per transceiver. | 2xFR4 can only link to each other. 800G FR4 not supplied by NVIDIA. LC optical connectors cannot be split. |
800G Single-Port Transceivers 500m for ConnectX-8 Embedded Mezzanine and PCIe Card Adapters | |||||||
Name | Form Factor | Configuration | Reach, Power | Part Number (link to product spec) | NVIDIA SKU | Figure | Notes |
800G DR4 Single mode | Single port MPO-12/APC optical connector | 4x200G-PAM4 electricalto4x200G-PAM4optical Parallel | 500m 18W |
OSFP-RHS | 980-9IAT0-00XM00 | 
| Links to 2x800G IHS or RHS transceivers. Used in B300, GB300, ConnectX-8 PCIe andmezzanine cards. |
Name | Configuration | Part Number (link to product spec) (one fiber) | Reach (m) | NVIDIA SKU | Figure |
Straight Fiber Cables Type-B Crossover MPO-12/APC | 4 channels to 4-channels Parallel | MFP7E30-N005 MFP7E30-N007MFP7E30-N010MFP7E30-N015MFP7E30-N020MFP7E30-N030MFP7E30-N050MFP7E30-N060MFP7E30-N070MFP7E30-N100MFP7E30-N150 | 3 5 710152030506070100150 | 980-9I55A-00N003 980-9I55B-00N005 980-9I58C-00N007980-9I58D-00N010980-9I58E-00N015980-9I58F-00N020980-9I58G-00N030980-9I58H-00N050980‑9I581‑00N050980-9I582-00N050980-9I58I-00N100980-9I58J-00N150 | 
|
1:2 Splitter Fiber Cables MPO-12/APC | 4 channels to Dual 2-channel Parallel | MFP7E40-N005 MFP7E40-N007MFP7E40-N010MFP7E40-N015MFP7E40-N020MFP7E40-N030MFP7E40-N050 | 3 5 71015203050 | 980-9I58K-00N003 980-9I58L-00N005 980‑9I58M‑00N007980-9I58N-00N010980-9I56O-00N015980-9I56P-00N020980-9I56Q-00N030980-9I56R-000050 | 
|
Notes (for table above):
Part numbers refer to one fiber only. Order two per twin-port OSFP transceiver.
2x800Gb/s transceivers used with 1:2 fiber splitters result in four 400Gb/s transceivers ends.
400Gb/s transceivers based on 200G-PAM4 are not offered. Use 800G transceivers with fiber 2-channel split ends.
Twin-port transceivers can only use either 2 straight or 2 splitter fiber cables; not one of each.
LC Duplex fibers and MPO-12/APC fibers beyond listed 50- or 150-meter reaches are not offered.
These are the same fiber cables used with NDR/400GbE.
MPO-12/APC cables use 8-fibers; 4 fibers are not used.
2x800G (1.6T) Active Electric Cables (AEC) Copper Switch-to-Switch (PVC mesh sheath) | |||||||
Name | Form Factor | Configuration | Reach (m) | Part Number (link to product spec) | NVIDIA SKU | Specs | Active Electric Cables (AEC) |
2x800G AEC IHS | OSFP-IHS toOSFP-IHS | 8x 200G-PAM4 to8x 200G-PAM4 | 1 1.5 22.53 | MCA4K50-X01A MCA4K50-X002MCA4K50-X02AMCA4K50-X003 | 980-9IAM5-00X001 980-9IAM5-00X01A 980-9IAM3-00X002980-9IAM3-00X02A980-9IAM3-00X003 | 26 AWG 27W | 
|
2x800G (1.6T) Linear Active Copper Cables (LACC) 1:1, 1:2 and 1:4 Splitters (PVC mesh sheath) | |||||||
Name | Form Factor | Channels | Reach (m) | Part Number (link to product spec) | NVIDIA SKU | Specs | Linear Active Copper Cables(LACC) |
2x800G 2x 800G 1:2Splitter | OSFP-IHS toOSFP-RHS | 8x 200G-PAM4 toDual4x 200G-PAM4 | 1 1.5 22.5 | MCA7K10-X001 MCA7K10-X01A MCA7K10-X002MCA7K10-X02A | 980-9IAO5-00X001 980-9IAO5-00X01A 980-9IAO5-00X002980-9IAO5-00X02A | 26 AWG 4.3W 8-ch end <0.1W split end | 
|
2x800G 4x 400G1:4Splitter | OSFP-IHS toOSFP-RHS | 8x 200G-PAM4 toQuad2x 200G-PAM4 | 1 1.5 22.5 | MCA7K20-X001 MCA7K20-X01A MCA7K20-X002MCA7K20-X02A | 980-9IAQ5-00X001 980-9IAQ5-00X01A 980-9IAQ5-00X002980-9IAQ5-00X02A | 26 AWG 4.3W 8-ch end <0.1W split end | 
|
Notes (for table above):
AEC contains DSP ICs in each end at 27 Watts; 22 Watts typical.
LACC contain linear amplifiers in 1.6T end at 4.3 Watts and <0.1 Watts in split end.
1:2 and 1:4 LACC splitters in the Q3400 can only link to the ConnectX-8 PCIe card -- not switches, Iris8 mezzanine card in B300, GB300. They can link to all cards and switches in the Q3200 switch.
Page updated: October 20, 2025