NVIDIA 980-9IAH1-00XM00 | 1.6T OSFP Transceiver | MMS4A00

NVIDIA 1.6T Twin-Port OSFP Optical Transceiver

The NVIDIA MMS4A00 (980-9IAH1-00XM00) is a high-performance 1.6 Tb/s twin-port OSFP optical transceiver designed for next-generation NVIDIA AI and HPC network fabrics. The module provides two independent 800 Gb/s DR4 optical interfaces from a single OSFP form factor, supporting high-density XDR InfiniBand connectivity between switches, compute infrastructure, storage systems, and high-performance network adapters.

Using 1310 nm single-mode optics and two MPO-12/APC connectors, the MMS4A00 supports optical links up to 500 meters. Its integrated heat-sink (IHS) finned-top design is intended for high-performance air-cooled networking platforms.

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Technical Specifications

AI & HPC Network Applications

The MMS4A00 is designed for high-bandwidth environments where network throughput and accelerator utilization are critical. Typical deployment scenarios include:

• NVIDIA Quantum-X800 and XDR InfiniBand fabrics
• AI training and inference clusters
• DGX and GPU compute infrastructure
• High-performance computing clusters
• Leaf-to-spine and switch-to-switch optical connections
• High-bandwidth compute and storage network connections
• Large-scale AI data center and SuperPOD architectures

Deployment & Compatibility

The twin-port architecture allows a single MMS4A00 module to provide two 800 Gb/s optical connections. NVIDIA documents the transceiver for use with its next-generation XDR networking ecosystem, including Quantum-X800 switching environments.

NVIDIA also uses 980-9IAH1-00XM00 within DGX B300 SuperPOD reference designs for both leaf-to-DGX and leaf-to-spine XDR fabric connectivity.

Compatibility should always be verified against the exact switch, network adapter, firmware, fiber topology, and port configuration before deployment.

Fiber & Cabling Requirements

The module uses two MPO-12/APC single-mode optical connectors. Two optical fiber connections are required to fully utilize both 800 Gb/s ports.

For direct transceiver-to-transceiver connections, NVIDIA specifies Type-B crossover single-mode fiber cabling so that transmit and receive lanes are correctly aligned. NVIDIA offers compatible crossover fiber assemblies in multiple lengths, while longer deployments up to the supported 500-meter reach may use an appropriate crossover segment or optical patch-panel design.

Documented Variant

• 980-9IAH1-00XM00 — IHS / finned-top twin-port 1.6T OSFP transceiver
• 980-9IAH0-00XM00 — RHS / flat-top version documented by NVIDIA for future liquid-cooled switch configurations

Frequently Paired Infrastructure

• NVIDIA Quantum-X800 / Quantum-3 XDR InfiniBand switches
• NVIDIA DGX B300 AI systems
• NVIDIA ConnectX high-performance network adapters
• MPO-12/APC Type-B single-mode fiber cables
• XDR InfiniBand leaf-spine networking infrastructure

FAQs

What does 1.6T mean on the NVIDIA MMS4A00?

The MMS4A00 provides an aggregate optical capacity of 1.6 Tb/s by supporting two independent 800 Gb/s DR4 optical interfaces within a single twin-port OSFP module.

What type of fiber does the MMS4A00 require?

The transceiver uses 1310 nm single-mode fiber with two MPO-12/APC optical connectors and supports link distances up to 500 meters.

Where is the MMS4A00 typically used?

It is designed for high-bandwidth NVIDIA XDR InfiniBand environments, including Quantum-X800 switching, AI and HPC clusters, and large DGX-based compute fabrics.