NVIDIA Mellanox® MCX545M-CCANA — ConnectX-5 EN 100GbE OCP 2.0 Multi-Host Adapter

Technical Identity
The NVIDIA Mellanox® MCX545M-CCANA is a ConnectX-5 EN Ethernet network interface card for OCP 2.0, with a single QSFP28 port rated for 100GbE, a PCIe 3.0 x16 host interface, and NVIDIA Multi-Host support — the M in the MCX545M series designates Multi-Host in NVIDIA's ConnectX-5 OCP 2.0 naming. Protocol: Ethernet only (EN series). Condition: Refurbished.

Specifications

  
Brand: NVIDIA Mellanox
  
Model / MPN: MCX545M-CCANA
  
NVIDIA P/N: — (ordering P/N not published for this OPN)
  
Product type: Ethernet network adapter, OCP 2.0 mezzanine
  
Product family: ConnectX-5 EN
  
Connector: 1× QSFP28
  
Configuration: Single-port, Multi-Host capable
  
Speed: Up to 100GbE per port
  
Modulation: 4 electrical lanes × 25Gb/s NRZ at 100GbE
  
Host interface: PCIe 3.0 x16; Multi-Host mode separates the x16 into independent PCIe connections per NVIDIA Multi-Host technology
  
Form factor: OCP 2.0
  
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 an SFP-family port. The QSFP28 cage will not accept SFP28 / SFP+ modules directly.
  
NOT an InfiniBand / VPI adapter. This EN-series card is Ethernet-only; EDR InfiniBand belongs to the ConnectX-5 VPI OPNs (e.g., MCX545M-ECAN).
  
NOT 200GbE-capable. Maximum port speed is 100GbE; 200GbE requires ConnectX-6 class hardware.
  
NOT plug-and-play in any server. Multi-Host operation requires a server platform specifically designed for NVIDIA Multi-Host; in other platforms the card must be validated as a standard single-host OCP 2.0 adapter first.
  
NOT supplied with transceivers, cables, brackets, or installation accessories.


Compatibility & Hard Constraints

  
Typical switch platforms: NVIDIA Spectrum / Spectrum-2 Ethernet switches with 100GbE QSFP28 ports; lower rates subject to port and cable verification.
  
Server requirement: server with a compatible OCP 2.0 mezzanine slot; Multi-Host use additionally requires a Multi-Host-enabled platform. 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: QSFP28 DAC, AOC, or 100GBASE-SR4/LR4-class optics.
  
Pre-deployment verification: confirm firmware version, driver version, port configuration, and Multi-Host platform support. Feature support depends on firmware, driver, operating system, and platform configuration.


Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MCX545M-CCANA?
The MCX545M-CCANA is a ConnectX-5 EN Ethernet network interface card in the OCP 2.0 mezzanine form factor, with one QSFP28 port rated for 100GbE, a PCIe 3.0 x16 host interface, and NVIDIA Multi-Host support (M designator). It is supplied by T.E.S IT-SOLUTIONS in Refurbished condition.
Q. What does Multi-Host mean on the MCX545M-CCANA?
NVIDIA Multi-Host technology allows the adapter's PCIe x16 interface to be separated into independent PCIe interfaces (documented by NVIDIA as up to four x4 connections on ConnectX-5 Multi-Host cards), each connected to a separate host CPU with no performance degradation. Multi-Host operation requires a server platform specifically designed for it.
Q. Is the port on the MCX545M-CCANA QSFP28 or SFP28?
QSFP28. It is a 4-lane cage running 100GbE (4 x 25Gb/s NRZ). It is not an SFP-family port and will not accept SFP28/SFP+ modules without a separately qualified QSA-style adapter.
Q. Will the MCX545M-CCANA 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 MCX545M-CCANA support InfiniBand or 200GbE?
No. This EN-series card is Ethernet-only, with a maximum port speed of 100GbE. InfiniBand EDR operation belongs to the VPI-series ConnectX-5 cards, and 200GbE requires ConnectX-6 class hardware.
Q. What switches work with the MCX545M-CCANA?
Typical platforms include NVIDIA Spectrum and Spectrum-2 Ethernet switches with 100GbE QSFP28 ports (e.g., SN2700/SN3700C-class), subject to cable and FEC verification.
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 MCX545M-CCANA 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.