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Green printed circuit board with silver metal bracket and two SFP+ ports

Mellanox Technologies

Mellanox ConnectX-3 MCX312A-XCBT 10 Gbps 2-Port SFP+ network card

SKU CH-61YY-BTB45

Dual-port 10 Gbps SFP+ Ethernet adapter with PCI Express 3.0 x8 host interface

  • 10 Gbps throughput per port for fast data transfer
  • Dual SFP+ ports give flexible fibre or copper links
  • PCI Express 3.0 x8 host interface provides high bandwidth
  • Plug-in card form factor fits standard server slots
  • Mellanox ConnectX-3 controller handles 10GBase-X networking

Dual 10 Gbps SFP+ adapter

The Mellanox ConnectX-3 MCX312A-XCBT is a dual-port 10 Gbps Ethernet adapter that plugs into a PCI Express 3.0 x8 slot. It targets servers and workstations that need two independent SFP+ links for storage, clustering or high-throughput networking.

Sustained 10 Gbps throughput

The ConnectX-3 controller is built for continuous line-rate traffic across both ports without throttling under load. Hardware offloads for TCP/IP, iSCSI and virtualization keep CPU utilisation low during prolonged transfers.

Low-profile plug-in card

The low-profile bracket fits standard and dense chassis while the two SFP+ cages accept a range of direct-attach cables or transceiver modules. No external power connector is required, so installation is limited to the x8 slot itself.

How it compares

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

Price $48.99
Cheaper than about 68% of the 1,505 comparable items (median $90.99).

Specifications

No published specifications for this item yet.

Questions about this item

How much power does the ConnectX-3 MCX312A-XCBT draw when both 10 Gbps ports run all day?

The card uses a PCI Express 3.0 x8 host interface and operates as a plug-in card without an external power connector, so power is supplied entirely by the slot.

What cabling and modules must I already own to use the two SFP+ ports?

Each port accepts standard SFP+ transceivers; you need two compatible SFP+ modules and matching fibre or direct-attach cables for the 10GBase-X links.

Will the PCIe 3.0 x8 interface work in my older PCIe 2.0 motherboard slot?

Yes, the ConnectX-3 is backward compatible and will negotiate down to PCIe 2.0 x8 or x4, still providing dual 10 Gbps throughput.

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