Model / Part Number: MMS4A20-XM800 (980-9IAT0-00XM00)

Brand: NVIDIA / Mellanox Original

Transceiver Module : NVIDIA MMS4A20-XM800 Single-Port Transceiver, 800Gbps, OSFP DR4, InfiniBand XDR, Single MPO-12/APC Connector, 1310nm Single-Mode Fiber (SMF), Up to 500m Reach, Riding Heat Sink (RHS / Flat Top)

The NVIDIA MMS4A20-XM800 (Part Number: 980-9IAT0-00XM00) is an original 800Gb/s single-port OSFP optical transceiver engineered for next-generation InfiniBand XDR supercomputing fabrics and high-density AI clusters. Utilizing a single 4-channel DR4 optical interface over single-mode fiber (SMF), this module delivers ultra-low-latency 800Gbps connectivity over distances of up to 500 meters.

Designed with an OSFP Riding Heat Sink (RHS / Flat Top) form factor, the MMS4A20-XM800 is purpose-built for liquid-cooled server architectures and compute tray environments, such as linking NVIDIA Quantum-X800 QM3x00 Switches to ConnectX-8 (C8180) network adapters on NVIDIA DGX B300 servers. Operating with 4 lanes of 200G-PAM4 (4x212.5Gb/s) electrical and optical modulation, it features a single MPO-12/APC optical connector, low power consumption (≤18W), and full compliance with CMIS 4.0 standards.

Key Features

• 800Gbps InfiniBand XDR Performance: Delivers single-port 800Gb/s data rates utilizing 4 lanes of 200G-PAM4 (4x 212.5Gb/s) signaling.
• Extended Datacenter Reach: Supports up to 500 meters transmission over Single-Mode Fiber (SMF) via a 1310nm EML transmitter and PIN receiver.
• OSFP Riding Heat Sink (RHS Flat Top): Optimized flat-top enclosure tailored for liquid-cooled compute trays and high-density front-panel OSFP cages.
• Single MPO-12/APC Connector: Streamlines high-density optical cabling using standard single-mode MPO-12/APC patch cords.
• Next-Gen AI Interconnect: Specifically designed to connect Quantum-X800 switches with dual-800G ConnectX-8 mezzanine and PCIe adapters in DGX B300 systems.
• Standards-Based & Reliable: Fully supports CMIS 4.0, Class 1 laser safety, hot-pluggable operation, and RoHS compliance with ≤18W power consumption.

Technical Specifications