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NVIDIA MCX516A-CCAT ConnectX-5 100GbE Ethernet network card with dual QSFP28 ports and PCIe 3.0 x16 interface

NVIDIA/Mellanox MCX516A-CCAT Mellanox ConnectX®-5 EN Network Interface Card, 100GbE Dual-port QSFP28, PCIe Gen 3.0×16, Tall Bracket

P/N: MCX516A-CCAT SKU: 11505

US$839.00

In Stock: 88 pcs

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Products Highlight

  • Dual 100G Rails for GPU Servers
  • 200G Aggregate for East-West Traffic
  • Active-Active Uplinks for Service Resilience
  • Breakout-Ready for Four 25G Hosts
  • Hardware VXLAN Offload for Cloud Hosts
  • NVMe-oF Offload for Flash Storage

Specifications

Part Number MCX516A-CCAT(900-9X5AD-0056-ST1) Adapter Card Size HHHL
Network Connector Type 2 × QSFP28 Network Mode Ethernet: 1/10/25/40/50/100GbE
Host Interface PCIe 3.0 ×16 Technology Ethernet: RoCE
Operating Temperature 0°C to 55°C Storage Temperature -40°C to 70°C
Environmental Compliance RoHS Compliant Warranty 1-Year / 3-Year / 5-Year Support Options Available

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Switch Series & Supported Models

Browse common switch series and models supported for each brand.

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NVIDIA/Mellanox MCX516A-CCAT Mellanox ConnectX®-5 EN Network Interface Card, 100GbE Dual-port QSFP28, PCIe Gen 3.0x16, Tall BracketNVIDIA/Mellanox MCX516A-CCAT Mellanox ConnectX®-5 EN Network Interface Card, 100GbE Dual-port QSFP28, PCIe Gen 3.0x16, Tall BracketNVIDIA/Mellanox MCX555A-ECAT Mellanox ConnectX®-5 VPI Adapter Card, EDR IB (100Gb/s) and 100GbE, Single-port QSFP28, PCIe 3.0x16, Tall BracketNVIDIA/Mellanox MCX555A-ECAT Mellanox ConnectX®-5 VPI Adapter Card, EDR IB (100Gb/s) and 100GbE, Single-port QSFP28, PCIe 3.0x16, Tall BracketNVIDIA/Mellanox MCX556A-ECAT Mellanox ConnectX®-5 VPI Adapter Card, EDR IB (100Gb/s) and 100GbE, Dual-port QSFP28, PCIe 3.0x16, Tall BracketNVIDIA/Mellanox MCX556A-ECAT Mellanox ConnectX®-5 VPI Adapter Card, EDR IB (100Gb/s) and 100GbE, Dual-port QSFP28, PCIe 3.0x16, Tall BracketNVIDIA/Mellanox MCX515A-CCAT Mellanox ConnectX®-5 EN Network Interface Card, 100GbE Single-port QSFP28, PCIe Gen 3.0x16, Tall BracketNVIDIA/Mellanox MCX515A-CCAT Mellanox ConnectX®-5 EN Network Interface Card, 100GbE Single-port QSFP28, PCIe Gen 3.0x16, Tall Bracket
Network Connector Type2 × QSFP281 × QSFP282 × QSFP281 × QSFP28
Network ModeEthernet: 1/10/25/40/50/100GbEInfiniBand: EDR (100Gb/s); Ethernet: 100GbEInfiniBand: EDR (100Gb/s); Ethernet: 100GbEEthernet: 1/10/25/40/50/100GbE
Host InterfacePCIe 3.0 ×16PCIe 3.0 ×16PCIe 3.0 ×16PCIe 3.0 ×16
TechnologyEthernet: RoCEInfiniBand: RDMA; Ethernet: RoCEInfiniBand: RDMA; Ethernet: RoCEEthernet: RoCE
Operating Temperature0°C to 55°C0°C to 55°C0°C to 55°C0°C to 55°C
Storage Temperature-40°C to 70°C-40°C to 70°C-40°C to 70°C-40°C to 70°C

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FAQ

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Find answers to common questions about our products.

Can both ports run at full 100G without any host-side limitation?

Not always. NVIDIA notes that PCIe Gen3 x16 provides a maximum bus bandwidth of 128Gb/s, so it cannot support full 200Gb/s aggregate throughput when both ports run at 100GbE at the same time.

Can this card connect to 40G, 50G, 25G, or 10G Ethernet equipment?

Yes. The adapter supports 1/10/25/40/50/100GbE Ethernet rates.

Can I split one QSFP28 port into 4×25G host interfaces?

No. NVIDIA forum guidance states that split mode is not supported on ConnectX-5 adapters, and 100G-to-4×25G breakout cables are intended for switch-side breakout toward hosts.

What is the difference between MCX516A-CCAT and MCX516A-CDAT?

Both are dual-port 100GbE QSFP28 cards, but MCX516A-CCAT is the PCIe Gen3 x16 version, while MCX516A-CDAT is the PCIe Gen4 x16 version. If you need both ports to sustain full 100G simultaneously, the Gen4 CDAT variant is the better fit.

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