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Green PCB network card with tall metal bracket and single QSFP28 cage

NVIDIA

NVIDIA MCX515A-CCAT ConnectX-5 EN 100GbE 1-Port QSFP28 PCIe 3.0 x16 network card

SKU CH-8Z62-QGX68 MPN MCX515A-CCAT

Single-port 100GbE QSFP28 adapter with PCIe 3.0 x16, 750ns latency and up to 200Mpps throughput for high-performance networking

  • 100Gb/s Ethernet throughput via single QSFP28 port
  • 750ns latency accelerates data centre workloads
  • 197Mpps DPDK packet rate reduces CPU load
  • Embedded PCIe switch enables NVMe over Fabric offload
  • PCIe 3.0 x16 interface supports multi-host connectivity

100GbE QSFP28 Single-Port Adapter

The NVIDIA MCX515A-CCAT ConnectX-5 EN is a single-port 100GbE network interface card using a QSFP28 optical fibre interface. It installs in a PCIe 3.0 x16 slot and is designed for high-performance Ethernet connectivity in data-centre environments.

Suited for high-throughput Ethernet workloads

This adapter targets servers requiring up to 100Gb/s Ethernet with advanced offloads such as NVMe over Fabric, adaptive routing and vSwitch acceleration. It is not for builds needing multi-port density, PCIe 4.0 x16 bandwidth, or copper-based cabling infrastructures.

PCIe 3.0 x16 host interface

The card connects through a PCIe 3.0 x16 edge connector, which determines the maximum host bandwidth available to the 100GbE port. Verify that the target server provides a compatible x16 slot running at Gen 3.0 speeds before purchase.

Highlights

  • 100Gb/s Ethernet throughput via single QSFP28 port
  • 750ns latency accelerates data centre workloads
  • 197Mpps DPDK packet rate reduces CPU load
  • Embedded PCIe switch enables NVMe over Fabric offload
  • PCIe 3.0 x16 interface supports multi-host connectivity

Specifications

No published specifications for this item yet.

Questions about this item

How is the MCX515A-CCAT installed and which bracket step is often missed?

Seat the card in a PCIe 3.0 x16 slot, secure the tall bracket with the case screw, then attach a QSFP28 transceiver and fibre before powering on; skipping the bracket screw leaves the port misaligned.

What maintenance or replacement will the ConnectX-5 EN card need later?

The only field-replaceable part is the QSFP28 transceiver; swap it if the link drops or if you change between 10, 25, 40, 50 or 100 GbE media — the card itself has no fan or battery.

What limit appears first under sustained 100 GbE load on this adapter?

The PCIe 3.0 x16 host bus sets the ceiling; with 16 lanes the theoretical maximum is below the 100 Gb/s line rate, so prolonged full-speed traffic will hit the bus before the 750 ns latency or 200 Mpps packet engine saturates.

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