NVIDIA Mellanox ConnectX-4 Lx EN MCX4621A-XCAB OCP3.0
Dual-Port 10GbE OCP 3.0 Adapter Card
Host Interface
PCIe 3.0 x8
Port Count
2-port
Port Speed & Connector Type
10GbE, SFP28 (backward compatible with SFP+), per port
Form Factor
OCP 3.0 Small Form Factor (SFF), tool-less/hot-swap capable
Network Protocol / RDMA
Ethernet with RoCE v2 (RDMA over Converged Ethernet)
Product Description
The NVIDIA Mellanox ConnectX-4 Lx EN MCX4621A-XCAB is a dual-port 10 Gigabit Ethernet network adapter in the Open Compute Project (OCP) 3.0 Small Form Factor, designed for tool-less, hot-swappable installation in OCP-compliant hyperscale and cloud server chassis. It connects via a PCIe 3.0 x8 host interface and is built around the MT27711A0-EDCF-GE controller, delivering the same RoCE v2 hardware-accelerated RDMA transport found across the ConnectX-4 Lx EN family, in a form factor optimized for high-density rack deployment. OCP 3.0 cards like the MCX4621A-XCAB are favored by hyperscalers and cloud operators for their standardized mechanical interface, simplified serviceability from the rear of the chassis, and reduced airflow impedance compared to traditional PCIe add-in cards, making this SKU well suited for large-scale, density-optimized server fleets standardizing on 10GbE connectivity.