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Mellanox ConnectX-5 EN Dual-Ports 100GbE QSFP28 PCI-Express 3.0 x16 High Profile Network Adapter - MCX516A-CCAT

Mellanox ConnectX-5 EN Dual-Ports 100GbE QSFP28 PCI-Express 3.0 x16 High Profile Network Adapter - MCX516A-CCAT

Part Number: MCX516A-CCAT
Manufacturer: Mellanox

Condition: Refurbished

Weight: 5.0 lbs

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Regular price $499.20
Regular price Sale price $499.20
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Mellanox ConnectX-5 EN Dual-Port 100GbE QSFP28 PCIe 3.0 Network Adapter — MCX516A-CCAT

The Mellanox ConnectX-5 EN (MCX516A-CCAT) is a dual-port 100GbE QSFP28 Ethernet network adapter featuring PCI-Express 3.0 x16 interface in a high-profile form factor. Designed for high-performance computing, AI/ML, storage networking, and data center environments requiring maximum Ethernet bandwidth, it delivers NVIDIA (Mellanox) ConnectX-5 ASIC performance with hardware offloads including RDMA over Converged Ethernet (RoCE), SR-IOV, and DPDK support.

Product Details

  • Part Number: MCX516A-CCAT
  • Manufacturer: Mellanox (NVIDIA)
  • Model: ConnectX-5 EN
  • Product Type: 100GbE Network Adapter

Key Features

  • Dual-Port 100GbE: Two independent 100Gbps ports for maximum bandwidth
  • QSFP28: Industry-standard 100GbE connector for DAC, AOC, and fiber transceivers
  • PCIe 3.0 x16: Maximum host bandwidth for 100GbE throughput
  • RoCE Support: RDMA over Converged Ethernet for low-latency storage and HPC
  • SR-IOV: Hardware virtualization for high-performance VM networking
  • DPDK Compatible: Data Plane Development Kit support for high-performance packet processing

Technical Specifications

  • Part Number: MCX516A-CCAT
  • Ports: 2x 100GbE (QSFP28)
  • Host Interface: PCI-Express 3.0 x16
  • Form Factor: High-profile PCIe
  • Features: RoCE, SR-IOV, DPDK, hardware offloads
  • OS Support: Linux, Windows Server, VMware ESXi

Use Cases

  • HPC / AI/ML: High-bandwidth, low-latency networking for HPC clusters and AI training
  • Storage Networking: RoCE for NVMe-oF and high-performance storage connectivity
  • Data Center: 100GbE server connectivity for spine-leaf data center architectures
  • Virtualization: SR-IOV for high-performance VM networking in ESXi and KVM

Compatibility Notes

  • QSFP28 — compatible with 100GbE DAC cables, AOC cables, and QSFP28 transceivers
  • Also supports 40GbE QSFP+ with appropriate cables/transceivers
  • Compatible with Linux, Windows Server, and VMware ESXi
  • NVIDIA (Mellanox) OFED drivers required for full RoCE and RDMA functionality

Frequently Asked Questions

What cables are compatible with the MCX516A-CCAT?
The MCX516A-CCAT uses QSFP28 connectors and is compatible with 100GbE QSFP28 DAC (Direct Attach Copper) cables, AOC (Active Optical Cables), and QSFP28 fiber transceivers. It also supports 40GbE QSFP+ with appropriate cables.
What is RoCE and why is it important?
RoCE (RDMA over Converged Ethernet) enables Remote Direct Memory Access over standard Ethernet — providing ultra-low latency and high throughput for storage (NVMe-oF), HPC, and AI/ML workloads without CPU overhead.
Is the MCX516A-CCAT compatible with VMware ESXi?
Yes — Mellanox provides native VMware ESXi drivers for the ConnectX-5 EN, with SR-IOV support for high-performance VM networking and direct device assignment.

Whether you are building an HPC cluster, deploying NVMe-oF storage networking, or connecting servers to a 100GbE data center fabric, the Mellanox ConnectX-5 EN (MCX516A-CCAT) delivers the dual-port 100GbE bandwidth, RoCE capability, and ConnectX-5 performance your high-performance network demands.

Frequently Asked Questions

Why do I see an incorrect image for this item?

Product images are meant for illustrative purposes alone, and you may not always see the original image.

What do you mean by term Refurbished?

Refurbished means a used computer part or device that has been cleaned, checked, and repaired to make sure it works properly again. Unlike regular second-hand items, refurbished products go through testing and fixing so they can perform like new.

How many days does it take to ship goods to customers?

All orders are processed within 1-2 business days. Orders placed on weekends or public holidays will be processed on the next business day. For more info visit shipping policy.

What is your return policy?

Our Return Policy comprises a 30-day warranty for Refurbished products. There will be a restocking fee applied when you return non-defective returns. For further details, kindly take a look at our Return Policy page.

Do you deliver my ordered items in their original retail box?

For Brand New items, you will receive them in their original retail box. For Refurbished items, you will receive them in a Brown Box or Bulk Packaging.

Do your printers come with ink cartridges?

Refurbished printers do not come with ink cartridges or toners.