NVIDIA Mellanox MCX342A-XCDN ConnectX-3 EN OCP 10GbE dual-port SFP+ Adapter: The MCX342A-XCDN is a ConnectX-3 EN dual-port 10 Gigabit Ethernet Open Compute Project (OCP) Mezzanine network interface card, MPN MCX342A-XCDN, with two SFP+ cages, a PCIe 3.0 x8 host interface, and IPMI/NC-SI enabled. This IS an OCP Mezzanine card; this IS NOT a standard PCIe slot adapter and ships without a low-profile or full-height bracket. Refurbished.
Engineering Context
The card is built around the ConnectX-3 EN ASIC and presents two independent 10 Gb/s SFP+ ports to the network. It connects to the host through 8 lanes of PCIe Gen3 at 8.0 GT/s, providing roughly 64 Gb/s of aggregate host bandwidth — comfortably above the 20 Gb/s line-side traffic. Hardware offloads include stateless TCP/UDP/IP checksum and segmentation (LSO/LRO), VLAN insertion/stripping, and RDMA over Converged Ethernet (RoCE v1 and v2). SR-IOV is supported for hypervisor passthrough to virtual machines. The OCP form factor places the SFP+ cages on the chassis-defined faceplate rather than a PCIe bracket.
Deployment & Use Cases
OCP Open Rack and Open Compute server platforms (Yosemite-class and Tioga Pass-class chassis), hyperscale web-tier compute, KVM and VMware ESXi virtualization hosts using SR-IOV, NFV-style edge appliances, storage front-end networks, and any OCP-compliant server where a mezzanine slot replaces a standard PCIe NIC bay.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number (MPN): MCX342A-XCDN
Controller / ASIC: ConnectX-3 EN
Form Factor: OCP Mezzanine card (no PCIe bracket)
Ports: 2 × SFP+
Maximum Data Rate: 10 GbE per port
Host Interface: PCIe 3.0 x8 (8.0 GT/s, ~64 Gb/s aggregate)
Sideband Management: IPMI/NC-SI enabled
Stateless Offloads: TCP/UDP/IP checksum, LSO, LRO, VLAN
RDMA: RoCE v1 / RoCE v2
Virtualization: SR-IOV
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Designed to fit OCP Mezzanine slots on Open Compute Project servers and chassis that expose a Mellanox-compatible OCP mezzanine connector. Does NOT fit standard PCIe slots — the card has no PCIe edge connector. Pluggables must be SFP+ at 10 Gb/s; SFP28 and QSFP modules are not supported. Driver support: Linux mlx4_en/mlx4_core (mainline kernel), VMware ESXi mlx4_en, and Windows mlx4 drivers. Sideband management requires a host BMC that implements NC-SI.
Why Choose T.E.S IT-SOLUTIONS
Every adapter is bench-tested, firmware-checked, and visually inspected before shipment by T.E.S IT-SOLUTIONS. We dispatch with 1–3 day handling, ship across the EU and worldwide, and provide engineering consultation on OCP fabric integration and driver selection.
Frequently Asked Questions
What host interface does the MCX342A-XCDN have?
The MCX342A-XCDN host interface is PCIe 3.0 x8 (8.0 GT/s, ~64 Gb/s aggregate), as listed in the specifications for MCX342A-XCDN.
What is the MCX342A-XCDN NOT compatible with?
this IS NOT a standard PCIe slot adapter and ships without a low-profile or full-height bracket. Confirm fitment against your platform before ordering MCX342A-XCDN.
What condition is the MCX342A-XCDN supplied in, and who sells it?
The MCX342A-XCDN is supplied in Refurbished condition by T.E.S IT-SOLUTIONS from EU stock, with 1-3 business day handling and worldwide B2B shipping. See https://www.tes-itsolutions.com/product-page/lot-of-4-mellanox-mcx342a-xcdn-ocp-10g-2-port-pcie-3-0-eth-card-support.