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Green single-port QSFP28 network card with tall bracket

Mellanox Technologies

Mellanox Technologies MCX515A-GCAT 50GbE QSFP28 PCIe 3.0 x16 network card

SKU CH-YPN9-RVK8Z MPN MCX515A-GCAT

Single-port 50GbE QSFP28 card on PCIe 3.0 x16 with tall bracket, 0.42 kg

  • Weight0.42
  • Single-port 50 GbE throughput for high-speed networking
  • PCIe 3.0 x16 interface delivers 16 lanes of bandwidth
  • QSFP28 connector supports 28 Gbaud signalling
  • Lightweight 0.42 kg design eases installation
  • ConnectX-5 EN controller enables efficient packet processing

Single-Port 50GbE QSFP28 Adapter

The Mellanox MCX515A-GCAT is a ConnectX-5 EN network interface card with one QSFP28 port running at 50GbE over a PCIe 3.0 x16 slot. It ships new with a tall bracket and meets ROHS R6 compliance. This adapter targets servers and workstations that need a single high-speed Ethernet link for storage, clustering or high-performance computing.

Suits Single-Link 50GbE Deployments

This card fits builds that require exactly one 50GbE connection and have a free x16 slot with a tall-bracket clearance. It is not for systems that need dual-port redundancy, multi-port aggregation or a low-profile bracket. Buyers who need fibre-channel support, OCP form-factor or a different PCIe generation should look at something else.

PCIe 3.0 x16 Electrical Interface

The card operates on a PCIe 3.0 x16 electrical interface, which determines whether the host platform can deliver full 50GbE throughput. Verify that the motherboard or riser provides a full x16 link and adequate bracket height before purchase.

Highlights

  • Single-port 50 GbE throughput for high-speed networking
  • PCIe 3.0 x16 interface delivers 16 lanes of bandwidth
  • QSFP28 connector supports 28 Gbaud signalling
  • Lightweight 0.42 kg design eases installation
  • ConnectX-5 EN controller enables efficient packet processing

Specifications

BrandMellanox Technologies Inc.
Weight0.42
Shipping weight0.10 kg
Package size203 × 178 × 51 mm

Questions about this item

Will this PCIe 3.0 x16 card run at full 50 GbE speed in an older PCIe 3.0 x8 slot?

The card needs a PCIe 3.0 x16 slot for full 50 GbE throughput; an x8 slot halves the bus bandwidth and will limit peak performance.

How can I confirm the ConnectX-5 EN is negotiating 50 GbE on the QSFP28 port after installation?

Check the link status in the OS network tool or switch management UI — it should show 50 Gb/s, full duplex, with no errors on the QSFP28 interface.

Does the box include a QSFP28 transceiver or DAC cable for the 50 GbE port?

The card ships with a tall bracket only; a compatible QSFP28 transceiver or direct-attach cable must be purchased separately.

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