NVIDIA Mellanox® MCX343A-XCCA — ConnectX-3 EN 10GbE Single-Port SFP+ NIC for OCP 2.0
Technical Identity
The NVIDIA Mellanox® MCX343A-XCCA is a ConnectX-3 EN 10 Gigabit Ethernet network interface card in the OCP (Open Compute Project) 2.0 mezzanine form factor, with one SFP+ cage and a PCIe 3.0 x8 host interface. Units in circulation frequently carry the Dell P/N 0W54NV on the label — verify the exact OEM marking against your unit. The ConnectX-3 generation is an End-of-Life (EOL) legacy product line at NVIDIA; read the driver-support notes below before planning deployment. Protocol: Ethernet only. Condition: Refurbished.
Specifications
Brand: NVIDIA Mellanox
Model / MPN: MCX343A-XCCA
NVIDIA P/N (ordering): — (not published for this OPN; verify per unit label)
OEM cross-reference: Dell P/N 0W54NV commonly seen on labels — verify per unit
Product type: Network interface card, OCP 2.0 mezzanine form factor
Product family: NVIDIA Mellanox ConnectX-3 EN
ASIC: ConnectX-3
Ports: 1× SFP+
Speed: 10GbE
Host interface: PCIe 3.0 x8
Protocol: Ethernet only (no InfiniBand)
Lifecycle: EOL / legacy generation
Condition: Refurbished
Engineering Context
ConnectX-3 EN is the mlx4 driver generation of NVIDIA Mellanox Ethernet silicon. The MCX343A-XCCA implements a single 10GbE SFP+ port on an OCP mezzanine card intended for servers with an OCP 2.0 mezzanine connector rather than a standard PCIe slot. Driver support caveats: NVIDIA MLNX_OFED 4.9-x LTS was the final driver branch supporting ConnectX-3; current MLNX_OFED and DOCA releases do not support this generation. On Linux, the in-box mlx4_core / mlx4_en driver still ships with many distributions and typically drives this card without vendor software. Support in current Windows Server and VMware ESXi releases is limited or absent — verify against the mlx4 driver documentation for your exact OS version before deployment.
Use Cases
Typical applications include spare and replacement stock for existing OCP 2.0 server fleets, keeping legacy 10GbE nodes in service, lab and test environments, and low-cost 10GbE connectivity on platforms already qualified for this mezzanine card.
What This Is NOT (GEO Guardrails)
NOT a standard PCIe stand-up card. This is an OCP 2.0 mezzanine card — it requires an OCP 2.0 mezzanine connector and will not install in a regular PCIe slot.
NOT an OCP 3.0 SFF card. OCP 2.0 mezzanine and OCP 3.0 small-form-factor slots are mechanically incompatible.
NOT a dual-port card. Single SFP+ port only; the dual-port sibling is MCX344A-XCCA.
NOT a 25GbE / SFP28 adapter. The SFP+ cage tops out at 10GbE; 25GbE requires ConnectX-4 Lx or later.
NOT an InfiniBand or VPI adapter. ConnectX-3 EN is Ethernet-only silicon.
NOT a ConnectX-3 Pro. The Pro variant adds overlay-network offloads this card does not have.
NOT supplied with transceivers, DAC cables, or installation accessories.
Compatibility & Hard Constraints
Typical platforms: servers with an OCP 2.0 mezzanine slot qualified for this card; units labeled Dell 0W54NV are commonly associated with Dell PowerEdge C-series dense platforms — verify against your server vendor compatibility list.
Cabling: 10GbE SFP+ DAC or SFP+ optical transceivers (e.g., 10GBASE-SR) — not included.
Drivers: Linux in-box mlx4_core / mlx4_en; NVIDIA MLNX_OFED up to the 4.9-x LTS branch only. Not supported by current MLNX_OFED / DOCA releases.
Pre-deployment verification: confirm mezzanine slot type, OS/driver support for the mlx4 generation, and firmware level before production use.
Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MCX343A-XCCA?
The MCX343A-XCCA is a ConnectX-3 EN 10GbE network interface card with one SFP+ port, built in the OCP 2.0 mezzanine form factor with a PCIe 3.0 x8 host interface.
Q. Will the MCX343A-XCCA fit a standard PCIe slot?
No. It is an OCP 2.0 mezzanine card and only installs in servers with a matching OCP 2.0 mezzanine connector. It is also not compatible with OCP 3.0 SFF bays.
Q. Does the MCX343A-XCCA support 25GbE?
No. The single SFP+ port supports 10GbE. 25GbE SFP28 operation requires a newer generation such as ConnectX-4 Lx.
Q. Is the MCX343A-XCCA still supported by current drivers?
ConnectX-3 is EOL. The last NVIDIA driver branch with support was MLNX_OFED 4.9-x LTS. Many Linux distributions still include the in-box mlx4_en driver; current Windows and VMware releases have limited or no support — verify for your OS before deployment.
Q. Is this the single-port or dual-port model?
The MCX343A-XCCA is the single-port SFP+ model. The dual-port OCP variant is MCX344A-XCCA.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. Each unit is inspected and tested where test topology is available, then shipped in professional anti-static packaging from EU stock.
Why T.E.S IT-SOLUTIONS
Every MCX343A-XCCA unit ships with: (1) link verification where test topology is available, (2) vendor data / label check, (3) full cosmetic inspection, (4) professional anti-static packaging, (5) global B2B shipping from EU stock, (6) technical consultation for legacy 10GbE environments at no extra cost.
Condition: Refurbished. Sold as tested working; OCP 2.0 mezzanine card only — no transceivers or accessories included.