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Mellanox ConnectX-3 network card with QSFP+ port and low-profile bracket

Mellanox Technologies

Mellanox Technologies CX353A MCX353A-FCBT FCBS network card

SKU CH-R4TA-SENAR

Adds 40 GbE and Infiniband connectivity with a QSFP+ port, plus low-profile and full-height brackets included

  • ConnectX-3 FDR Infiniband for high-performance computing clusters
  • 40GbE QSFP+ port delivers low-latency Ethernet connectivity
  • Low-profile and full-height brackets fit diverse server chassis
  • New condition ensures full manufacturer specification compliance
  • First listed by manufacturer in 2023 for current availability

ConnectX-3 FDR Infiniband adapter

This Mellanox ConnectX-3 network adapter provides a single 40 GbE QSFP+ port for high-throughput server connectivity. It operates on an FDR Infiniband link and fits a standard PCI Express slot. The card ships new with both a low-profile bracket and a full-height baffle included.

Suited for single-port 40G clusters

It serves administrators building or expanding a single-port 40 GbE fabric or FDR Infiniband cluster. Buyers who need dual-port redundancy or a different media type such as SFP+ should look at other adapters.

Single QSFP+ port at 40 GbE

The decisive specification is the single QSFP+ interface running at 40 GbE over FDR Infiniband. Confirm that your switch and cabling match this port type and speed before purchase.

How it compares

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

Price $115.99
Pricier than about 55% of the 1,505 comparable items (median $90.99).

Specifications

No published specifications for this item yet.

Questions about this item

What does the 40GbE capability deliver inside a server?

The card supports 40 gigabit Ethernet over a QSFP+ port, giving line-rate throughput for high-density clusters or storage fabrics when paired with compatible optics or direct-attach cables.

Which bus interface does the ConnectX-3 FDR adapter use and what bandwidth ceiling does it impose?

It plugs into a PCIe 3.0 x8 slot, so the practical ceiling is the eight-lane generation 3 link speed rather than the port's own 40 Gb/s rating.

What brackets ship with the MCX353A-FCBT for rack mounting?

The box includes both a low-profile bracket and a full-height baffle, letting you secure the card in either 1U half-height or standard full-height chassis slots.

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