NVIDIA Mellanox ConnectX-3 Pro MCX312B-XCCT

The NVIDIA Mellanox ConnectX-3 Pro MCX312B-XCCT is a dual-port 10 Gigabit Ethernet adapter card built on the ConnectX-3 Pro EN controller (MT27528A0-FCCR-XE), combining two independent SFP+ ports with a PCIe 3.0 x8 host interface. It shares the same physical card design as the MCX312B-XCCS variant, with the two part numbers differing primarily in bracket or packaging configuration rather than in core networking capability. Like other ConnectX-3 Pro cards, it offers hardware offload for VXLAN and NVGRE overlay network encapsulation alongside enhanced RoCE v1, stateless TCP/UDP/IP offloads, LSO, RSS and SR-IOV virtualization support. The dual-port design allows NIC teaming, link aggregation, and redundant network paths for production servers that require resilient 10GbE connectivity. As a mature member of the ConnectX-3 Pro family, the MCX312B-XCCT is well suited to virtualization-focused deployments, storage networking, and budget-conscious 10GbE refresh projects where overlay offload and dual-port redundancy are valued.