NVIDIA Mellanox ConnectX-3 MCX311A-XCBT
PCIe 3.0 x8 Single-Port 10GbE SFP+ ConnectX-3 Ethernet Adapter
Host Interface
PCIe 3.0 x8
Port Count
1
Port Speed & Connector Type
10Gb/s, SFP+
Network Protocol
Ethernet (RoCE v1)
RDMA Support
RoCE v1
Product Description
The NVIDIA Mellanox ConnectX-3 MCX311A-XCBT is a single-port 10 Gigabit Ethernet network adapter from the original ConnectX-3 EN generation, connecting through a PCIe 3.0 x8 host interface to a single SFP+ cage. Built around the MT27518A1-FCCR-XE controller, the card delivers line-rate 10GbE throughput and supports hardware-accelerated RDMA over Converged Ethernet (RoCE v1) for low-latency, CPU-offloaded data transport between hosts. As a mature single-port design, MCX311A-XCBT remains a practical, cost-effective 10GbE connectivity option for servers that need only a single uplink, lab/test environments, or environments maintaining hardware fleet consistency with existing ConnectX-3 deployments during phased infrastructure refreshes.