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Green PCB plug-in card with single QSFP port and gold PCIe fingers

Mellanox Technologies

Mellanox Technologies MCX353A-QCBT 10Gbps network card

SKU CH-811B-X567J MPN MCX353A-QCBT

A PCI Express x8 plug-in card with a single QSFP slot delivering 10Gbps Ethernet connectivity

  • Rated speed10 Gbit/s
  • Interface typePCI-Express
  • Key featuresNumber of Total Expansion Slots:1 Number of QSFP Slots:1 Pro
  • 10Gbps throughput for high-speed data workloads
  • PCI Express x8 host interface for server compatibility
  • Single QSFP slot for flexible 10GBase-X connectivity
  • Low-profile 2-inch height fits dense chassis
  • RoHS-6 certified for environmentally responsible deployment

10Gbps QSFP network adapter

The Mellanox MCX353A-QCBT is a PCI Express x8 plug-in card that delivers 10Gbps connectivity through a single QSFP slot. It targets enterprise data centres, high-performance computing clusters and embedded systems that require low-latency InfiniBand or Ethernet links. RoHS-6 compliance confirms environmentally friendly materials.

Half-height bracket and driver support

The 50.80 mm by 142.24 mm form factor fits standard low-profile brackets, so installation only requires an available x8 slot and a compatible QSFP transceiver. Most issues arise when the transceiver is not coded for the switch vendor or when the operating system lacks the correct OFED driver stack for VPI mode.

Sustained throughput with ConnectX-3

Under continuous load the ConnectX-3 controller maintains line-rate 10Gbps without thermal throttling thanks to its efficient ASIC design. Latency remains stable during long-running database replication, parallel compute jobs or high-frequency trading feeds, avoiding the performance drops seen in burst-only benchmarks.

How it compares

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

Price $417.99
Pricier than about 84% of the 1,505 comparable items (median $90.99).

Specifications

Product
Brand nameMellanox
Model nameMCX353A-QCBT
Performance
Rated speed10 Gbit/s
Ports & slots
Interface typePCI-Express
Size & build
Shipping weight0.21 kg
Package size225 × 175 × 55 mm

Questions about this item

How can I confirm the MCX353A-QCBT is operating correctly after installation?

The adapter should appear as a PCI Express x8 device in your system BIOS and OS device manager with a 10GBase-X link detected on the QSFP port.

What comes with the MCX353A-QCBT and what must be sourced separately?

The card itself includes one QSFP cage; you will need to purchase compatible QSFP transceivers and cables for the 10Gbps connection.

Which version of the MCX353A-QCBT should I choose for a low-profile 2-inch slot?

This model measures 2 inches (50.80 mm) high by 5.60 inches (142.24 mm) wide, fitting low-profile brackets for 10Gbps networking.

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