We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green printed circuit board with gold PCIe edge connector and two silver SFP+ cages at the rear bracket

Mellanox Technologies

Mellanox Technologies MCX4121A-XCAT 10Gbps network card

SKU CH-82BM-YGBEG MPN MCX4121A-XCAT

Dual-port 10Gbps SFP+ network card with PCI Express 3.0 x8 host interface

  • Speed10Gbps
  • InterfacePCI Express 3.0 x8
  • FeaturesProduct Type:10Gigabit Ethernet Card
  • 10Gbps throughput via dual SFP+ ports
  • PCIe 3.0 x8 host interface for high bandwidth
  • Two-port design adds link redundancy
  • Plug-in card form factor fits standard servers
  • RoHS-6 certified for environmental compliance

Dual-port 10GbE SFP+ adapter

This Mellanox ConnectX-4 MCX4121A-XCAT card adds two 10Gbps Ethernet ports through SFP+ cages. It installs in a PCI Express 3.0 x8 slot and suits servers or workstations that need high-throughput optical links.

Check slot and transceiver stock

Verify your motherboard has a free PCIe 3.0 x8 slot with enough physical clearance for a plug-in card. You will also need two compatible SFP+ optical modules and matching fibre patch cables, which are not included.

Replaces single-port or copper 10GbE

Upgrading from a single-port 10GbE card doubles available bandwidth for storage or cluster traffic. The jump is worth it when your workload saturates one 10Gbps link or when you need redundant fibre paths to separate switches.

Highlights

  • 10Gbps throughput via dual SFP+ ports
  • PCIe 3.0 x8 host interface for high bandwidth
  • Two-port design adds link redundancy
  • Plug-in card form factor fits standard servers
  • RoHS-6 certified for environmental compliance

Specifications

BrandMellanox
ModelMCX4121A-XCAT
Speed10Gbps
InterfacePCI Express 3.0 x8
FeaturesProduct Type:10Gigabit Ethernet Card
Shipping weight0.20 kg
Package size197 × 152 × 38 mm

Questions about this item

Does the MCX4121A-XCAT include SFP+ transceivers and cables, or must they be purchased separately?

The card provides two SFP+ ports for optical fibre; transceivers and patch cables are not included and must be sourced separately.

The range includes other ConnectX-4 cards — how do I decide whether this MCX4121A-XCAT is the right one?

This model delivers two 10 Gbps ports over a PCI Express 3.0 x8 slot; choose it when you need dual-port 10 GbE connectivity in that form factor.

What does the 10 Gbps rating mean once the card is installed in a server?

Each of the two ports can carry up to 10 Gbps of 10GBase-X traffic over the PCI Express 3.0 x8 host interface.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.