NVIDIA Mellanox® MCX412A-XCAT — ConnectX-4 EN 10GbE Dual-Port SFP+ PCIe3.0 x8
Technical Identity
The NVIDIA Mellanox® MCX412A-XCAT is a ConnectX-4 EN dual-port 10GbE Ethernet network adapter with two SFP+ cages on a PCIe 3.0 x8 host interface, supplied with a Tall Bracket and RoHS R6 compliant. It delivers full 10GbE line-rate throughput with hardware offloads — RoCE v2, NVMe-oF, VXLAN/NVGRE stateless offloads, and SR-IOV — making it a cost-efficient dual-10GbE NIC for virtualized servers, NVMe storage targets, and SDN/NFV deployments. Condition: Refurbished Grade A.
Specifications

Brand: NVIDIA Mellanox
Model / MPN: MCX412A-XCAT
Product family: ConnectX-4 EN
Product type: Ethernet Network Adapter (NIC)
Ports: 2× 10GbE SFP+
Host interface: PCIe 3.0 x8
Bracket: Tall Bracket (included)
Compliance: RoHS R6
Protocol: Ethernet (10GbE per port)
Offloads: RoCE v2, NVMe-oF, VXLAN/NVGRE stateless offloads, SR-IOV
Form factor: Standard PCIe add-in card
Condition: Refurbished Grade A

What This Is NOT

NOT 25GbE or higher. 10GbE maximum per port. For 25GbE, see ConnectX-4 Lx (MCX4121A-ACAT) or ConnectX-5.
NOT InfiniBand. Ethernet EN variant only — no IB or VPI dual-protocol support.
NOT PCIe 4.0. PCIe 3.0 x8 host interface.
NOT an OCP 2.0/3.0 mezzanine. Standard PCIe Tall Bracket add-in card.
NOT bundled with SFP+ transceivers, DAC cables, or other accessories.

Compatibility & Constraints

Host: PCIe 3.0 x8 slot (operates in any x8 or wider mechanical slot).
Switch: Any 10GbE SFP+-capable switch. Typical platforms include NVIDIA Spectrum SN2010/SN2100, Cisco Nexus 9000/3000, and Arista 7050/7280 series.
Cabling: 10GbE SFP+ DAC, SFP+ AOC, or MSA-compliant 10GbE SFP+ optical transceivers.
Drivers: MLNX_OFED, MLNX_EN, or inbox Linux/Windows drivers; verify firmware against current NVIDIA release notes before deployment.

Frequently Asked Questions (FAQ)
Q. What is the MCX412A-XCAT?
ConnectX-4 EN NIC: dual 10GbE SFP+, PCIe 3.0 x8, Tall Bracket, RoHS R6. Supports RoCE v2, NVMe-oF, VXLAN/NVGRE offloads, and SR-IOV.
Q. Does the MCX412A-XCAT support InfiniBand?
No. The MCX412A-XCAT is the Ethernet EN variant only — no IB support. For VPI (IB + Ethernet) on ConnectX-4, see the MCX454A series.
Q. What SFP+ transceivers and cables work with the MCX412A-XCAT?
Any MSA-compliant 10GbE SFP+ transceiver, SFP+ DAC, or SFP+ AOC. Verify module compatibility against the MLNX_OFED supported module list before deployment.
Q. What hardware offloads does the MCX412A-XCAT support?
RoCE v2 for RDMA storage and HPC, NVMe-oF target/initiator acceleration, VXLAN/NVGRE stateless tunnel offloads, and SR-IOV for virtualized workloads.
Q. What condition does T.E.S IT-SOLUTIONS supply?
Refurbished Grade A — EEPROM-verified, link-tested where topology allows, cosmetically inspected, shipped from EU stock with anti-static packaging.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-center networking specialist focused on NVIDIA Mellanox hardware. Every unit is MPN-identified, EEPROM-verified, and cosmetically inspected before leaving our EU warehouse. Multi-currency B2B invoicing, worldwide express shipping, and free pre-sale compatibility consultation for switch, NIC, and cable pairing are included with every order.