NVIDIA Mellanox ConnectX-5 EN MCX515A-GCAT
Single-Port 50GbE PCIe 3.0 Ethernet Adapter
Host Interface
PCIe 3.0 x16
Port Count
1-port
Port Speed & Connector Type
50G QSFP28
Form Factor
Standard PCIe card
Network Protocol / RDMA
Ethernet, RoCE v2
Product Description
The NVIDIA Mellanox ConnectX-5 EN MCX515A-GCAT is a single-port 50 Gigabit Ethernet adapter in a standard PCIe card form factor, connecting through a PCIe 3.0 x16 host interface. Its single QSFP28 port delivers 50GbE connectivity with hardware-accelerated RoCE v2 RDMA, enabling low-latency, CPU-efficient data movement for storage networking, virtualization, and compute-intensive workloads. The card supports NVMe over Fabrics (NVMe-oF) offload, SR-IOV network virtualization, and overlay network acceleration for VXLAN, GENEVE, and NVGRE traffic, along with advanced congestion management for lossless RDMA fabrics. As a single-port card, it suits servers requiring a dedicated high-speed uplink without the cost or PCIe lane overhead of a dual-port adapter, making it a cost-effective choice for compute nodes, storage targets, and edge servers where one 50GbE connection meets bandwidth requirements.