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Green PCB network card with dual QSFP28 ports and PCIe x8 gold fingers

Mellanox Technologies

Mellanox Technologies MCX414A-GCAT 50GbE dual-port QSFP28 network card

SKU CH-PSN3-RSMWC MPN MCX414A-GCAT

Dual-port QSFP28 card delivering 50 Gb/s Ethernet over PCIe 3.0 x8 for server networking

  • Interface typePCI Express 3.0 x8
  • Key featuresConnectX-4 EN Network Controller with 50Gb/s Ethernet connec
  • Dual 50 Gb/s ports double server bandwidth
  • PCI Express 3.0 x8 host interface fits standard server slots
  • Two QSFP28 cages accept optical fiber transceivers
  • Compact 5.6" × 2.7" plug-in card saves chassis space
  • RoHS-6 certification confirms environmentally friendly materials

Mellanox ConnectX-4 EN 50GbE Card

This Mellanox MCX414A-GCAT network interface card delivers 50GbE throughput through two QSFP28 ports using a PCI Express 3.0 x8 host connection. It is built for servers that need high-bandwidth Ethernet for cloud, data analytics, database and storage workloads. The card conforms to RoHS-6 environmental standards. Its plug-in form factor measures 5.6 inches by 2.7 inches.

Suited For And Not Suited For

This dual-port adapter suits server integrators deploying 50GbE optical links in PCIe 3.0 x8 slots where ConnectX-4 EN controller features are required. It is not for systems that lack a PCIe 3.0 x8 slot, cannot accommodate the stated card dimensions, or require a port count, media type or controller generation not provided by this specific model.

Deciding Specification

The single specification that determines fit is the dual-port QSFP28 interface operating at 50GbE over PCI Express 3.0 x8; if the target server slot, cabling plan or speed requirement differs from this combination, the card will not meet the deployment need.

How it compares

Measured against everything we stock in Ethernet Cards & NICs, at today’s prices. Recalculated every night.

Price $933.99
Pricier than about 91% of the 1,505 comparable items (median $90.99).

Specifications

Product
Brand nameMellanox
Model nameMCX414A-GCAT
Ports & slots
Interface typePCI Express 3.0 x8
Size & build
Shipping weight0.25 kg
Package size224 × 170 × 56 mm

Questions about this item

My server only has PCIe 3.0 x8 slots — will the MCX414A-GCAT run at full 50GbE speed on that interface?

Yes, the card uses a PCI Express 3.0 x8 host interface, matching the slot exactly and providing the bandwidth needed for dual-port 50GbE throughput.

I plan to keep my existing QSFP+ optical modules — can I use them with the dual QSFP28 ports on this card?

The ports are QSFP28; they accept QSFP+ modules at reduced speeds, but 50GbE operation requires 50G-capable QSFP28 optics or direct-attach cables.

After installing the card, how can I confirm both 50GbE links are actually up and negotiating correctly?

Check the link LEDs on each port and verify in the OS or switch CLI that both interfaces show 50Gb/s speed, full duplex, and no errors.

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