NVIDIA Mellanox MCX341A-XCPN ConnectX-3 Pro EN Single-Port SFP+ 10GbE OCP Mezzanine Card (Lot of 4): This is a lot of four refurbished OCP 2.0 mezzanine network cards. Each card is a ConnectX-3 Pro EN (Ethernet-only) controller with a single SFP+ port at 10GbE. The host interface is PCIe 3.0 x8 routed through the OCP mezzanine connector. This is NOT a standard PCIe add-in card — it requires an OCP 2.0-compatible server slot and will not fit a normal PCIe slot. Each unit is refurbished.
Engineering Context
OCP (Open Compute Project) Mezzanine 2.0 is a board form factor used by hyperscale and enterprise servers (Dell, HPE, Lenovo, Inspur, Quanta) to keep the rear of the server clear for storage drives and to centralize networking. ConnectX-3 Pro adds overlay-network offload (VXLAN, NVGRE) on top of standard ConnectX-3 features, making it relevant for SDN-managed virtualization stacks. The Pro generation also supports RoCEv2 with congestion control. PCIe 3.0 x8 provides 64Gb/s host bandwidth, ample headroom for a single 10GbE port. Power draw is approximately 7W typical.
Deployment & Use Cases
Refresh or expansion of OCP-based compute pools using ConnectX-3 Pro generation NICs. Hyper-converged infrastructure where four matched OCP NICs are needed for symmetric node configurations. Storage front-end networking on OCP servers with NFS, iSCSI, or RoCEv2 NVMe-oF at 10GbE. Cluster builds requiring overlay-network offload (VXLAN/NVGRE) on the host NIC.
Technical Specifications
- OEM: NVIDIA Mellanox
- Part Number: MCX341A-XCPN
- Controller: ConnectX-3 Pro EN
- Ports: Single SFP+
- Data Rate: 10 Gigabit Ethernet (10GbE)
- Host Interface: PCIe 3.0 x8 via OCP connector
- Form Factor: OCP 2.0 Mezzanine
- RDMA: RoCEv1, RoCEv2 with congestion control
- Overlay Offload: VXLAN, NVGRE stateless encapsulation
- Virtualization: SR-IOV up to 127 VFs
- Quantity: Lot of 4 cards
- Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Requires OCP 2.0 mezzanine slot in the host server. WILL NOT fit standard PCIe x8/x16 add-in slots. Not compatible with OCP 3.0 (NIC 3.0) — those use a different connector geometry. Server BIOS must enumerate the OCP slot as a PCIe device for the card to be discovered. This is an EN (Ethernet-only) card — InfiniBand and VPI mode are not supported on the XCPN SKU. SFP+ cage accepts passive DAC, active DAC, and SR/LR optical transceivers; some servers enforce vendor-coded transceiver whitelists. RoCEv2 deployment requires lossless DCB or PFC configuration on the switching fabric.
Why TES
T.E.S IT-SOLUTIONS bench-tests every OCP NIC in the lot for link establishment, PCIe lane width through the OCP connector, and firmware reachability before shipment. Visit tes-itsolutions.com for compatibility checks against your specific OCP server platform. Handling time 1–3 business days with international shipping.
Frequently Asked Questions
What data rate does the MCX341A-XCPN have?
The MCX341A-XCPN data rate is 10 Gigabit Ethernet (10GbE), as listed in the specifications for MCX341A-XCPN.
What is the MCX341A-XCPN NOT compatible with?
This is NOT a standard PCIe add-in card — it requires an OCP 2.0-compatible server slot and will not fit a normal PCIe slot. Confirm fitment against your platform before ordering MCX341A-XCPN.
What condition is the MCX341A-XCPN supplied in, and who sells it?
The MCX341A-XCPN 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-mcx341a-xcpn-single-port-sfp-ocp-eth-card-10gbe-support.