NVIDIA Mellanox MCX341A-XCGN ConnectX-3 EN OCP 10GbE single-port SFP+ Adapter: The MCX341A-XCGN is a ConnectX-3 EN single-port 10 Gigabit Ethernet Open Compute Project (OCP) Mezzanine network interface card, MPN MCX341A-XCGN, with one SFP+ cage, a PCIe 3.0 x8 host interface, and no NC-SI/IPMI sideband. 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 a single 10 Gb/s SFP+ port 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 10 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): MCX341A-XCGN
Controller / ASIC: ConnectX-3 EN
Form Factor: OCP Mezzanine card (no PCIe bracket)
Ports: 1 × SFP+
Maximum Data Rate: 10 GbE per port
Host Interface: PCIe 3.0 x8 (8.0 GT/s, ~64 Gb/s aggregate)
Sideband Management: no NC-SI/IPMI sideband
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. Out-of-band BMC sharing through NC-SI is not exposed on this SKU.
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.