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NVIDIA/Mellanox MMS4X00-NM-FLT Compatible 800GBASE-DR8 (2xDR4) Twin-port OSFP RHS/Flat Top PAM4 1310nm 500m Dual MPO-12/APC DDM SMF InfiniBand NDR Optical Transceiver Module for Liquid-cooled and DGX H100 Cedar7 Systems

Product No: 202944
12 Reviews
13 Sold
US$ 799.00
6 in real-time stock, 24 Jun, 2026

Free Shipping over US$ 79.8

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5-Year Warranty 1-Year Exchange
Warranty
Providing industry-leading limited lifetime warranty.
Please check our warranty policy for details.
Returns & Exchange
Exchanges caused by the customer's reasons will not be accepted.
Please ensure that the item you're returning is repackaged with all the cords, adapters, and documentation included when you receive it.
Please check our Return Policy for details.
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1. 100% verified by the original
2. Flat top design for DGX- H100 Cedar-7 or liquid-cooled
3. Support the InfiniBand NDR and Ethernet protocols
4. 8x 100G-PAM4 electrical to Dual 4x 100G-PAM4 optical Parallel
5. Maximum power consumption ≤14.5W
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Specifications

NVIDIA/Mellanox MMS4X00-NM-FLT Compatible 800G DR8 OSFP RHS/Flat Top PAM4 Twin-port InfiniBand NDR Optical Transceiver Module (1310nm, 500m, 2x MPO-12/APC Connectors, SMF, 0℃ to +70℃, DDM)

 

NVIDIA/Mellanox MMS4X00-NM-FLT compatible 800G DR8 (2x400G DR4) OSFP is an Infiniband and Ethernet twin-port transceiver module with dual MPO-12 APC connectors at 400Gb/s each. It enables the fiber link of 500m at 2x400Gb/s over single-mode fiber (SMF). With the Pulse-amplitude Modulation (PAM4) modulation, the 2xDR4 OSFP adopts 8-channels of 100G-PAM4 electrical modulation and two ports of 4-channel 100G-PAM4 optical Parallel modulation.

 

With a flat top design, the OSFP-RHS is offered for Liquid-cooled systems and DGX H100 Cedar7 systems links. Its main application is to link the DGX H100 “Viking” CPU chassis to Cedar-7 complex to switches together up to 100 meters. QSFPTEK NVIDIA InfiniBand compatible optics are 100% tested in NVIDIA InfiniBand host devices, ideal for InfiniBand NDR end-to-end systems.

 

Part Number QT-OSFP-800G-2DR4-RHS Vendor Name QSFPTEK
Form Factor Twin-port OSFP-RHS/Flat Top Max Data Rate 850Gbps (8x 106.25Gbps)
Wavelength 1310nm Distance 500m
Connector Dual MPO-12/APC Cable Type SMF
Transmitter Type EML Receiver Type PIN PD
TX Power -2.9 to 4 dBm Receiver Sensitivity < -5.9 dBm
Packaging Technology COB (Chip on Board) Packaging Receiver Overload 4 dBm
Power Consumption ≤14.5W Modulation Format 8x 100G-PAM4 electrical to Dual 4x 100G-PAM4 optical Parallel
Extinction Ratio >3.5dB CDR (Clock and Data Recovery) TX & RX Built-in DSP
Application Liquid-cooled systems and DGX H100 Cedar7 systems links MTBF 4016064 Hours
DDM/DOM Supported Temperature 0 to 70°C (32 to 158°F)
Protocols OSFP MSA, IEEE 802.3ck-2022, CMIS Rev 5.0 Warranty 5 Years
Quality Testing Program
Quality Certifications

Applications

Twin-port 800G (2x400G) OSFP IB/ETH Switch to DGX H100 GPU Systems:

Twin-port 800G (2x400G) OSFP IB/ETH Switch to DGX H100 GPU Systems

Product details

Undergoes Comprehensive Performance Testing to Guarantee Optimal Reliability

 

The QSFPTEK test center conducts complete testing procedures with advanced professional test equipment, including BER test, eye diagram test, Optical Spectrum test, jitter test, etc. Each module has been stringently tested by world-class test devices from Keysight and Anritsu to guarantee flawless operation and optimal reliability.

 

Performance test devices  

 


 

Select a Proper Heat Dissipation Design for Your Needs

Finned Top vs Flat Top

Closed Finned Top 800G OSFP optics with Integrated Heat Sink (IHS) design are used for both Quantum-2 InfiniBand or Spectrum-4 Ethernet air-cooled and liquid-cooled systems. Flat top 800G OSFP optics with Riding Heat Sink (RHS) design are used in Liquid-cooled and DGX H100 Cedar7 Systems.

 


Questions & Answers

  • ALL (15)
  • QT-OSFP-800G-2SR4 (2)
  • QT-OSFP-800G-2VR4 (4)
  • QT-OSFP-800G-2FR4 (2)
  • QT-OSFP-800G-2DR4 (1)
  • 800G InfiniBand NDR (4)

Customer Reviews

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  • Shopping Experience (2)
  • Repurchase (1)
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  • Customer Services (1)
  • Aiguo Singapore
    2026-06-17

    Got this OSFP for our DGX H100 setup and it's been running like a champ. Plugged it in, no issues, link came right up. QSFPTEK has been solid across the board. I've bought a bunch of stuff from them and I'll definitely be back for more.

    Transceivers typeMMS4X00-NM-FLT OSFP 2DR4 | 500m | Dual MPO-12/APC | RHS/Flat Top

    CompatibleNVIDIA (InfiniBand/Ethernet)

    Verified Purchase

    Helpful

    0

  • Marjorie Augustine United States of America
    2026-05-09

    We ordered these modules for a new rack deployment and were pleased with the compatibility. The switches recognized them immediately, and there were no firmware-related issues during commissioning. Everything worked as expected.

    Transceivers typeMMS4X00-NM-FLT OSFP 2DR4 | 500m | Dual MPO-12/APC | RHS/Flat Top

    CompatibleNVIDIA (InfiniBand/Ethernet)

    Verified Purchase

    Helpful

    0

  • Roderick United States of America
    2026-05-04

    We had a few pre-sale questions before placing the order, and the support team responded quickly with clear answers. That level of service gave us confidence to move forward.

    Transceivers typeMMS4X00-NM-FLT OSFP 2DR4 | 500m | Dual MPO-12/APC | RHS/Flat Top

    CompatibleNVIDIA (InfiniBand/Ethernet)

    Verified Purchase

    Helpful

    0

  • Nikola D. United States of America
    2026-04-02

    These liquid-cooled flat-top modules are handling the traffic perfectly. I’ve been using QSFPTEK for years and they’ve never let me down. Already planning my next order.

    Transceivers typeMMS4X00-NM-FLT OSFP 2DR4 | 500m | Dual MPO-12/APC | RHS/Flat Top

    CompatibleNVIDIA (InfiniBand/Ethernet)

    Verified Purchase

    Helpful

    0

  • Bob J United States of America
    2026-03-24

    The first data center is now up and running, and the QSFPTEK transceivers are working really well. We were impressed with how fast the hardware arrived, and we appreciate your help throughout the process to make the deployment go smoothly.

    Transceivers typeMMS4X00-NM-FLT OSFP 2DR4 | 500m | Dual MPO-12/APC | RHS/Flat Top

    CompatibleNVIDIA (InfiniBand/Ethernet)

    Verified Purchase

    Helpful

    0

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  • PDF Document
    QT-OSFP-800G-2DR4-RHS 500M Datasheet.pdf
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NVIDIA/Mellanox MMS4X00-NM-FLT Compatible 800GBASE-DR8 (2xDR4) Twin-port OSFP RHS/Flat Top PAM4 1310nm 500m Dual MPO-12/APC DDM SMF InfiniBand NDR Optical Transceiver Module for Liquid-cooled and DGX H100 Cedar7 Systems

Compatible NVIDIA (InfiniBand/Ethernet)

Transceivers type MMS4X00-NM-FLT OSFP 2DR4 | 500m | Dual MPO-12/APC | RHS/Flat Top

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Mark

2023-12-15
This product works well with my switch, and I plan to buy some DWDM transceivers from QT. Excellent value fo ct works well with my switch, and I plan to buy some DWDM transceivers from QT. Excellent valur money!

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NVIDIA/Mellanox MMS4X00-NM-FLT Compatible 800GBASE-DR8 (2xDR4) Twin-port OSFP RHS/Flat Top PAM4 1310nm 500m Dual MPO-12/APC DDM SMF InfiniBand NDR Optical Transceiver Module for Liquid-cooled and DGX H100 Cedar7 Systems
US$ 799.00
Compatible
NVIDIA (InfiniBand/Ethernet)
Transceivers type
MMS4X00-NM-FLT OSFP 2DR4 | 500m | Dual MPO-12/APC | RHS/Flat Top
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NVIDIA/Mellanox MMS4X00-NM-FLT Compatible 800GBASE-DR8 (2xDR4) Twin-port OSFP RHS/Flat Top PAM4 1310nm 500m Dual MPO-12/APC DDM SMF InfiniBand NDR Optical Transceiver Module for Liquid-cooled and DGX H100 Cedar7 Systems

Compatible NVIDIA (InfiniBand/Ethernet)

Transceivers type MMS4X00-NM-FLT OSFP 2DR4 | 500m | Dual MPO-12/APC | RHS/Flat Top

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