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Mellanox ConnectX-4 dual-port QSFP28 network adapter card

Mellanox Technologies

Mellanox Technologies ConnectX-4 VPI EDR 100GbE QSFP28 Dual Port Adapter

SKU CH-3BVN-VR8XM

Dual-port 100 Gbps network adapter with PCI Express 3.0 x16 and QSFP28 connectors

  • TypeNetwork Adapter
  • EDR 100 Gb/s InfiniBand and Ethernet connectivity
  • PCI Express 3.0 x16 host interface
  • QSFP28 dual-port design for flexible cabling
  • Plug-in card form factor for standard servers
  • Retail part MCX456A-ECAT for easy ordering

ConnectX-4 VPI EDR 100 Gb/s Adapter

The Mellanox ConnectX-4 VPI adapter delivers 100 Gb/s InfiniBand and Ethernet connectivity through two QSFP28 ports. It installs in a PCI Express 3.0 x16 slot as a standard plug-in card. The retail part number is MCX456A-ECAT.

Suited for high-performance clusters

This dual-port card fits servers that need low-latency 100 Gb/s links for data analytics, databases or web-scale workloads. Builders requiring single-port density, lower-speed Ethernet or a different form factor should consider other options.

Requires PCIe 3.0 x16 slot and QSFP28 transceivers

The adapter occupies a full-length x16 lane and needs compatible optics or direct-attach cables for each port. It frees the CPU from protocol processing by offloading RDMA and transport tasks directly on the card.

Highlights

  • EDR 100 Gb/s InfiniBand and Ethernet connectivity
  • PCI Express 3.0 x16 host interface
  • QSFP28 dual-port design for flexible cabling
  • Plug-in card form factor for standard servers
  • Retail part MCX456A-ECAT for easy ordering

Specifications

BrandMellanox
TypeNetwork Adapter

Questions about this item

Does my motherboard need a PCI Express 3.0 x16 slot for the MCX456A-ECAT?

Yes, the ConnectX-4 VPI EDR adapter requires a PCIe 3.0 x16 slot to deliver the full 100 Gb/s bandwidth per port.

Will the dual QSFP28 ports negotiate down to 28 Gb/s InfiniBand FDR links?

The VPI ports auto-negotiate and will run at FDR 28 Gb/s when connected to compatible FDR switches or cables.

How can I confirm the card is operating at 100 Gb/s Ethernet after installation?

Check the link status with ethtool or the Mellanox firmware tools; both ports should report 100 Gb/s full duplex when connected to 100 GbE switches.

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