NVIDIA Mellanox ConnectX-5 MCX512A-ADAT

The NVIDIA Mellanox ConnectX-5 MCX512A-ADAT is a dual-port 25 Gigabit Ethernet network adapter from the ConnectX-5 Ex EN family, built on the MT28808A0-FCCF-EV controller for PCIe 4.0 x8 host connectivity. The Ex variant pairs the proven ConnectX-5 offload engine with the extra PCIe 4.0 headroom, letting the card sustain dual 25GbE line-rate throughput even on lane-constrained x8 slots common in dense 1U/2U servers. It supports RDMA over Converged Ethernet (RoCE v2) for low-latency, CPU-efficient data movement, hardware storage acceleration for NVMe-oF targets, and SR-IOV for dense multi-tenant virtualization. Quality-of-service controls, CPU offload, jumbo frame support, NC-SI sideband management, LLDP topology discovery, and QCN-based congestion notification round out a feature set aimed at busy East-West data center fabrics. Distributed by MABLETECH, the MCX512A-ADAT is well suited for organizations building out PCIe 4.0 servers that still need to fit a 25GbE adapter into an x8 electrical slot without giving up bandwidth headroom.