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Low-profile PCIe network adapter with dual QSFP ports

Mellanox Technologies

Mellanox Technologies MCX414A-BCAT network connector 40Gb 56Gb QSFP x2 PCIe 3.0 x8 low profile

SKU CH-98HP-3QMPS MPN MCX414A-BCAT

Dual-port 40Gb/56Gb QSFP adapter with PCIe 3.0 x8 low-profile design for high-speed server connectivity

  • ConnectX-4 EN controller delivers 100Gb/s bandwidth for demanding data workloads
  • Dual QSFP ports support 40Gb and 56Gb Ethernet connectivity options
  • PCIe 3.0 x8 interface provides high-throughput host connection for servers
  • Low-profile bracket fits space-constrained 1U and blade chassis designs
  • New condition ensures full manufacturer specifications and reliability

Dual-port QSFP adapter for 40 and 56 Gb Ethernet

The Mellanox MCX414A-BCAT is a low-profile ConnectX-4 EN network adapter designed for servers that require dual 40 Gb or 56 Gb Ethernet links over QSFP cages. It installs in a PCIe 3.0 x8 slot and targets cloud, analytics and storage workloads needing high throughput.

Thermals and power in a low-profile bracket

The half-height form factor fits dense chassis where airflow is restricted, so the controller relies on system fans moving air across the heatsink. Typical power draw scales with link speed and traffic load, and the adapter exposes no onboard fan, keeping acoustic contribution minimal in rack environments.

Two QSFP cages and x8 lane constraint

Dual QSFP ports allow link aggregation or separate fabrics without occupying additional slots, but the x8 electrical interface caps total bidirectional bandwidth at the PCIe 3.0 x8 ceiling. Low-profile brackets suit 1 U and blade servers, while full-height brackets are not included in this configuration.

Highlights

  • ConnectX-4 EN controller delivers 100Gb/s bandwidth for demanding data workloads
  • Dual QSFP ports support 40Gb and 56Gb Ethernet connectivity options
  • PCIe 3.0 x8 interface provides high-throughput host connection for servers
  • Low-profile bracket fits space-constrained 1U and blade chassis designs
  • New condition ensures full manufacturer specifications and reliability

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the MCX414A-BCAT in a PCIe 3.0 x8 slot and what step is often missed?

Seat the low-profile bracket into a PCIe 3.0 x8 slot, secure the retention screw, then attach QSFP cables to both ports; the step often missed is installing the ConnectX-4 EN driver before linking the network.

What maintenance or replacement will the MCX414A-BCAT need later?

The adapter has no moving parts; maintenance is limited to firmware updates for the ConnectX-4 controller and occasional dust removal from the heatsink, while QSFP transceivers are replaced only if a link fails.

What limit appears first on the MCX414A-BCAT under sustained 56Gb/s loads?

Each QSFP port is rated for 56Gb/s Ethernet, so the port speed ceiling is reached before the dual-port aggregate of 100Gb/s or the PCIe 3.0 x8 host interface becomes the bottleneck.

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