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Green printed circuit board with dual QSFP28 ports and gold PCIe x16 edge connector

Mellanox Technologies

Mellanox MCX516A-CCAT 100GbE Dual-port QSFP28 PCIe 3.0 x16 expansion card

SKU CH-PEZ9-XD030

Adds two 100 GbE QSFP28 ports via a PCIe 3.0 x16 slot for high-speed networking

  • 100 GbE throughput with dual QSFP28 ports
  • PCIe 3.0 x16 lane width for high bandwidth
  • ConnectX-5 controller drives low-latency networking
  • New condition ensures full manufacturer reliability
  • First listed by manufacturer in October 2024

Network Interface Card 100GbE Dual Port

The Mellanox MCX516A-CCAT is a ConnectX-5 based network interface card delivering 100GbE throughput across two QSFP28 ports. It targets datacentre and high-performance computing environments that need low-latency Ethernet connectivity. The card installs in a PCIe 3.0 x16 slot and is supplied in new condition.

PCIe 3.0 x16 Slot QSFP28 Cabling

Integration requires an available PCIe 3.0 x16 lane and compatible QSFP28 transceivers or direct-attach cables for each port. The dual-port design frees a second expansion slot that would otherwise be occupied by a single-port adapter. Adequate chassis airflow must be provided for the card’s thermal envelope.

High-Density 100GbE Deployments

This adapter suits clusters, storage fabrics and hyper-scale workloads demanding 100GbE density in a half-height form factor. It is not intended for desktop PCs lacking PCIe 3.0 x16 bandwidth or QSFP28 cabling infrastructure. Buyers needing Fibre Channel or InfiniBand protocols should select a different ConnectX variant.

Punti di forza

  • 100 GbE throughput with dual QSFP28 ports
  • PCIe 3.0 x16 lane width for high bandwidth
  • ConnectX-5 controller drives low-latency networking
  • New condition ensures full manufacturer reliability
  • First listed by manufacturer in October 2024

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Domande su questo articolo

What is the PCIe lane width that limits sustained throughput on the MCX516A-CCAT?

The card uses a PCIe 3.0 x16 interface, so the lane width is 16 lanes.

How much power does the ConnectX-5 controller draw when both 100 GbE ports run continuously?

Typical power draw is 24 W for the dual-port 100 GbE configuration.

Which transceiver modules must I already own to connect the two QSFP28 ports?

You need two QSFP28 modules or cables rated for 100 GbE, one per port.

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