Refurb Squared
NVIDIA/Mellanox MMS4X50-NM Compatible 800GBASE 2 x FR4 OSFP Closed Finned Top 8 x 100G PAM4 1310nm 2km DOM Dual Duplex LC/UPC SMF InfiniBand NDR Optical Transceiver Module for Quantum-2 Switches
NVIDIA/Mellanox MMS4X50-NM Compatible 800GBASE 2 x FR4 OSFP Closed Finned Top 8 x 100G PAM4 1310nm 2km DOM Dual Duplex LC/UPC SMF InfiniBand NDR Optical Transceiver Module for Quantum-2 Switches
ISO 14001:2015
ISO 45001:2018
ISO 9001:2015
The NVIDIA/Mellanox InfiniBand MMS4X50-NM Compatible OSFP Optical Transceiver is an 800Gb/s 2x 400Gb/s Twin-port OSFP, 2x FR4 single mode, Multiplexed, 8-channel transceiver using two, 2-fiber, LC Duplex optical connectors each carrying 4-channels of 100G-PAM4. The dual Far Reach 8-channel (2x FR4) design uses 100G-PAM4 electrical and optical modulation based on the CWDM4 serial, multiplexed 1310nm wavelength grid. It is qualified for use in InfiniBand NDR end-to-end systems. The twin-port OSFP closed finned top transceiver is used in Quantum-2 air-cooled switches. Featured with low latency, low power, and reliability, it can link upward in spine-leaf architectures for switch-to-switch applications, downward for top-of-rack switch links to ConnectX® smart network adapters, and/or to BlueField-3 DPUs in compute servers and storage subsystems. It is the ideal solution for HPC computing, AI, and cloud data centers. Note: This "Closed Finned Top" refers to a closed top design, which uses a finned-top but with a lid on top of the fins creating a closed channel for additional cooling. It is engineered to support both airflow cooling and liquid-cooled environments, offering enhanced mechanical protection and thermal compatibility in high-density systems.
Enterprise Grade Performance
Enterprise Grade Performance
Our networking cables and optical transceivers are designed for high-performance enterprise networks. They support fast data transmission, stable connectivity, and consistent signal strength across switches, servers, and routers.
Wide Device Compatibility
Wide Device Compatibility
These modules are engineered to work with many leading networking brands such as Cisco, Juniper, Arista, and other enterprise systems. They integrate easily into existing network infrastructure.
Simple Plug And Play Setup
Simple Plug And Play Setup
Installation is quick and easy. Simply insert the cable or transceiver into the compatible port and it begins operating immediately without complicated configuration.
Reliable Connection Stability
Tested And Verified Products
Affordable Enterprise Pricing

Competitive Pricing
Refurb Squared networking hardware delivers high-speed connectivity using tested optical modules and enterprise-grade cables built for reliability and seamless device compatibility.
Built For Reliable Networking
At Refurb Squared we provide high-quality networking hardware trusted by engineers and IT professionals. Our mission is to deliver reliable technology at affordable prices.





