Coherent VCSEL & 
Broadcom DSP Coherent VCSEL & Broadcom DSP Item Spotlights
NVIDIA/Mellanox Compatible Coherent VCSEL & Broadcom DSP 800G 2xSR4/SR8 Optical Transceiver Module for ConnectX-8 C8180 SuperNIC (Twin-port OSFP, 850nm, 100m, Two MPO-12/APC, DOM, for MMF, Flat Top)
NADDOD NVIDIA/Mellanox compatible OSFP-800G-2SR4F is an Ethernet 800Gb/s 2x400Gb/s Twin-port OSFP, 2xSR4/SR8 multimode, parallel, 8-channel transceiver using two 4-channel MPO-12/APC optical connectors at 400Gb/s each. The parallel 8-channel design adopts 100G-PAM4 modulation and supports up to 100 m transmission over 8 multimode fibers. Built-in Coherent VCSEL & Broadcom DSP, it is compatible with NVIDIA ConnectX-8 C8180 SuperNIC, ensuring stable signal integrity and high-speed 800G optical performance. Finned-top OSFP shells provide enhanced thermal dissipation for 800G switches, while flat-top versions are available for ConnectX-8 system links.
The Twin-port 2xSR4/SR8 architecture enables efficient 2×400G breakout from a single 800G port, improving port density and deployment flexibility. It is well suited for high-bandwidth, low-latency optical fabrics in AI and HPC clusters, delivering scalable 800G connectivity with optimized power efficiency and reliable performance in high-density environments.
The OSFP-800G-2SR4F module is tightly integrated with the C8180 SuperNIC’s multi-plane architecture, delivering key advantages in large-scale computing clusters. By distributing traffic across multiple planes, it maximizes bandwidth, enables smoother load balancing, and ensures consistently low latency. Each plane is isolated and inherently redundant, so a single path failure does not impact service continuity, enhancing overall reliability. With higher resource utilization and fewer congestion points, the ConnectX-8 architecture enables faster scaling and a more efficient, stable, and resilient network experience.
In ConnectX-8 NIC and Spectrum-4 switch AI cluster architectures, the C8180 paired with OSFP-800G-2SR4F reduces optical module count by 20% compared with the C8240 using Q112-400G-SR4 solution. This delivers the following three key advantages.
