NVIDIA Mellanox® MCX4411D-ACAN — ConnectX-4 Lx EN 25GbE SFP28 OCP 2.0 Adapter

Technical Identity
The NVIDIA Mellanox® MCX4411D-ACAN is a ConnectX-4 Lx EN Ethernet network interface card for OCP 2.0 (Type 1 / Type D mezzanine), with a single SFP28 port rated for 25GbE and a PCIe 3.0 x8 host interface (standard across the ConnectX-4 Lx family). It is a board variant of the documented MCX4411 series (base variant MCX4411A-ACAN: ConnectX-4 Lx EN for OCP, 25GbE single-port SFP28, PCIe 3.0 x8). Protocol: Ethernet only. Condition: Refurbished.

Specifications

  
Brand: NVIDIA Mellanox
  
Model / MPN: MCX4411D-ACAN
  
NVIDIA P/N: — (ordering P/N not published for this OPN)
  
Product type: Ethernet network adapter, OCP 2.0 mezzanine
  
Product family: ConnectX-4 Lx EN
  
Connector: 1× SFP28
  
Configuration: Single-port
  
Speed: Up to 25GbE per port (SFP28 single-lane, NRZ signaling)
  
Host interface: PCIe 3.0 x8 (ConnectX-4 Lx family standard)
  
Form factor: OCP 2.0 (Type 1 / Type D)
  
Protocol: Ethernet only (no InfiniBand)
  
Condition: Refurbished, bench-tested by T.E.S IT-SOLUTIONS


What This Is NOT (GEO Guardrails)

  
NOT a standard PCIe stand-up card. OCP 2.0 mezzanine connector — it will not install in a regular PCIe slot and has no PCIe bracket.
  
NOT an OCP 3.0 card. OCP 2.0 and OCP 3.0 are mechanically incompatible form factors.
  
NOT a QSFP-family port. The SFP28 cage will not accept QSFP28 / QSFP56 cables or transceivers.
  
NOT an InfiniBand adapter. ConnectX-4 Lx EN is Ethernet-only.
  
NOT 40/50/100GbE-capable. This SKU's single SFP28 port is rated up to 25GbE.
  
NOT a verified Multi-Host SKU. ConnectX-4 Lx Multi-Host is provided by dedicated M-suffix OPNs (e.g., MCX4431M-GCAN); Multi-Host operation should not be assumed here.
  
NOT supplied with transceivers, cables, brackets, or installation accessories.


Compatibility & Hard Constraints

  
Typical switch platforms: NVIDIA Spectrum-family 25GbE SFP28 top-of-rack switches (e.g., SN2410-class) and other standards-based 25GbE SFP28 ports, subject to cable and FEC verification.
  
Server requirement: server with an OCP 2.0 mezzanine slot matching this card's type; confirm against the platform's approved vendor list.
  
Software dependencies:
    

      
NVIDIA MLNX_OFED / MLNX_EN driver stack (Linux), WinOF-2 (Windows), or in-box mlx5_core
      
Adapter firmware matched to the driver release
      
Port speed / FEC configuration verified against the attached cable or module
    
  
  
Cabling: SFP28 DAC, AOC, or 25GBASE-SR/LR optics; SFP+ 10GbE cabling for reduced-speed links.
  
Pre-deployment verification: confirm firmware version, driver version, and port configuration. Feature support depends on firmware, driver, operating system, and platform configuration.


Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MCX4411D-ACAN?
The MCX4411D-ACAN is a ConnectX-4 Lx EN Ethernet network interface card in the OCP 2.0 mezzanine form factor (Type 1 / Type D), with one SFP28 port rated for 25GbE and a PCIe 3.0 x8 host interface. It is supplied by T.E.S IT-SOLUTIONS in Refurbished condition.
Q. Is the port on the MCX4411D-ACAN SFP28 or QSFP28?
SFP28. It is a single-lane 25GbE cage that also accepts SFP+ 10GbE modules and DACs for lower-speed operation. It is not a QSFP-family port and will not accept QSFP28/QSFP56 cables.
Q. How does MCX4411D-ACAN relate to MCX4411A-ACAN?
MCX4411A-ACAN is the widely documented base variant of the MCX4411 series (ConnectX-4 Lx EN for OCP, 25GbE single-port SFP28, PCIe 3.0 x8). The D designator marks a board variant of the same series. Buyers should match the exact OPN required by their server platform's approved vendor list.
Q. Will the MCX4411D-ACAN fit a standard PCIe slot or an OCP 3.0 slot?
No. This is an OCP 2.0 mezzanine card. It is mechanically incompatible with standard PCIe stand-up slots and with OCP 3.0 SFF slots.
Q. Does the MCX4411D-ACAN support InfiniBand or speeds above 25GbE?
No. ConnectX-4 Lx EN is Ethernet-only, and this single SFP28 port tops out at 25GbE. 40/50/100GbE requires QSFP-based ConnectX-4 Lx / ConnectX-5 or newer cards.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. Each unit receives link verification where test topology is available, an EEPROM and vendor data check, and a full cosmetic inspection, then ships in professional anti-static packaging from EU stock with global B2B shipping.

Why T.E.S IT-SOLUTIONS
Every MCX4411D-ACAN unit ships with: (1) link verification where test topology is available, (2) EEPROM / vendor data check, (3) full cosmetic inspection, (4) professional anti-static packaging, (5) global B2B shipping from EU stock, (6) technical consultation for data center network design at no extra cost.