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 circuit board with silver metal bracket and two QSFP ports

Mellanox Technologies

Mellanox Technologies MCX354A-FCBT ConnectX-3 VPI network card 40GbE 56Gb/s IB dual QSFP PCIe 3.0 x8

SKU CH-WF9V-FZQDB

Dual QSFP network adapter delivering 40 GbE and 56 Gb/s InfiniBand over PCIe 3.0 x8

  • Dual-port QSFP design enables 40 GbE and 56 Gb/s InfiniBand connectivity
  • PCI Express 3.0 x8 host interface delivers 8 GT/s throughput for low-latency data transfer
  • Virtual Protocol Interconnect supports both Ethernet and InfiniBand fabrics on a single adapter
  • Compact plug-in card measures 2.7 by 5.6 inches for dense server deployments
  • RoHS-6 compliant construction meets environmental standards for data-centre use

Dual-port QSFP card for 40 GbE

The Mellanox ConnectX-3 VPI adapter plugs into a PCIe 3.0 x8 slot and presents two QSFP cages. It targets enterprise data centres, high-performance computing clusters and embedded systems that need both Ethernet and InfiniBand fabrics from a single piece of hardware.

Fits a standard PCIe 3.0 x8 slot

The half-height bracket measures 2.7 inches by 5.6 inches, so it suits low-profile chassis. Each cage accepts a QSFP transceiver or direct-attach cable, freeing the builder from sourcing separate Ethernet and InfiniBand adapters for the same server.

RoHS-6 compliant with no active cooling on the card

Power draw and thermal output are handled passively through the heatsink, keeping acoustic impact at zero. The host system must supply adequate airflow across the slot, but the adapter itself adds no fan noise to the rack.

How it compares

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

Price $61.99
Cheaper than about 60% of the 1,505 comparable items (median $90.99).

Specifications

No published specifications for this item yet.

Questions about this item

What throughput limit appears first on the dual-QSFP ConnectX-3 VPI under sustained load?

Each QSFP port supports up to 40 Gb/s Ethernet or 56 Gb/s InfiniBand FDR, so the port speed is the first bottleneck before the PCIe 3.0 x8 host link saturates.

How loud and hot does the MCX354A-FCBT get during all-day operation?

The card is a passive plug-in design with no onboard fan; it relies on chassis airflow and runs within typical server thermal limits for a PCIe 3.0 x8 adapter.

Which QSFP transceivers or direct-attach cables must I already own to use both ports?

You need two QSFP+ modules or DACs rated for 40 GbE or FDR InfiniBand, matching the fibre type and reach your links require.

More in Ethernet Cards & NICs

Similar items