NVIDIA Mellanox ConnectX-4 MCX414A-BCAT
Dual-Port 40/56GbE QSFP28 Adapter, PCIe 3.0 x8
Host Interface
PCIe 3.0 x8
Port Count
2-port
Port Speed & Connector Type
40GbE/56GbE, QSFP28 (56GbE requires Mellanox switch)
RDMA / Network Protocol
RoCE v2 (RDMA over Converged Ethernet)
Controller / ASIC
MT27708A0-FDCF-CE (ConnectX-4 EN)
Product Description
The NVIDIA Mellanox ConnectX-4 EN MCX414A-BCAT is a dual-port 40/56 Gigabit Ethernet adapter card built on the ConnectX-4 EN controller (MT27708A0-FDCF-CE), providing two independent QSFP28 ports over a shared PCIe 3.0 x8 host interface. Each port can be configured to run at 56GbE Ethernet speed when paired with a Mellanox switch, giving data center operators flexibility to scale bandwidth to match their network fabric. The card supports RDMA over Converged Ethernet (RoCE v2), enabling low-latency, low-CPU-overhead data transport for storage and compute traffic, along with the hardware offload capabilities characteristic of the ConnectX-4 EN generation. Dual-port connectivity on a single adapter supports network redundancy, link aggregation, and higher aggregate bandwidth from a single PCIe slot, making the MCX414A-BCAT a practical choice for enterprise and cloud servers that need dual-homed 40/56GbE connectivity without consuming two expansion slots.