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Green PCB network card with tall metal bracket and two QSFP28 ports

Mellanox Technologies

Mellanox Technologies MCX516A-CCHT 100Gbps network card

SKU CH-K0J6-QBRMV MPN MCX516A-CCHT

Adds 100Gbps dual-port QSFP28 Ethernet over PCIe 3.0 x16 with ConnectX-5 EN and UEFI support

  • Speed100Gbps
  • Connectors2 x QSFP28
  • InterfacePCIe 3.0 x16
  • FeaturesConnectX-5 EN network interface card, with host management 1
  • 100Gbps throughput for demanding data-centre workloads
  • Dual QSFP28 ports enable flexible high-density cabling
  • PCIe 3.0 x16 interface delivers full bandwidth to the host
  • ConnectX-5 EN controller adds hardware offload and host management
  • UEFI support allows boot-from-network deployment

ConnectX-5 EN 100 GbE Adapter

The Mellanox MCX516A-CCHT is a dual-port ConnectX-5 EN network interface card that delivers 100 Gbps Ethernet through two QSFP28 connectors. It installs in a PCIe 3.0 x16 slot and includes a tall bracket for standard server chassis. UEFI support is enabled for modern boot environments.

Suited for high-throughput server links

This adapter fits servers that need twin 100 GbE uplinks for storage fabrics, clustering or high-performance computing. Systems without a PCIe 3.0 x16 slot, or racks that only accept low-profile cards, cannot accommodate the tall bracket and x16 electrical width.

Dual QSFP28 ports at 100 Gbps

The decisive specification is the pair of QSFP28 cages rated for 100 Gbps each, providing two independent 100 GbE links from a single x16 slot. Buyers who need a different port count, a different connector type or a lower-speed Ethernet adapter should select another model.

Highlights

  • 100Gbps throughput for demanding data-centre workloads
  • Dual QSFP28 ports enable flexible high-density cabling
  • PCIe 3.0 x16 interface delivers full bandwidth to the host
  • ConnectX-5 EN controller adds hardware offload and host management
  • UEFI support allows boot-from-network deployment

Specifications

BrandMellanox
ModelMCX516A-CCHT
Speed100Gbps
Connectors2 x QSFP28
InterfacePCIe 3.0 x16
FeaturesConnectX-5 EN network interface card, with host management 100GbE dual-port QSFP28, PCIe3.0 x16, UEFI Enabled, tall bracket
Shipping weight0.20 kg
Package size190 × 161 × 26 mm

Questions about this item

Does the MCX516A-CCHT ship with QSFP28 transceivers or cables, or must they be purchased separately?

The card provides two QSFP28 ports; transceivers and cables are not included and must be sourced to match your link distance and fibre type.

Should I choose the dual-port 100Gbps MCX516A-CCHT or a single-port alternative for my server?

Select this dual-port model when you need two independent 100GbE links for redundancy or aggregate throughput; a single-port card suits simpler one-link deployments.

What does the 100Gbps rating mean when the card is installed in a PCIe 3.0 x16 slot?

Each port can run at 100GbE line rate; the PCIe 3.0 x16 interface supplies sufficient bandwidth for both ports simultaneously without host-side bottleneck.

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