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NVIDIA MCX555A-ECAT ConnectX-5 100Gb/s VPI adapter card with one QSFP28 port and PCIe 3.0 x16 interface

NVIDIA/Mellanox MCX555A-ECAT Mellanox ConnectX®-5 VPI Adapter Card, EDR IB (100Gb/s) and 100GbE, Single-port QSFP28, PCIe 3.0×16, Tall Bracket

P/N: MCX555A-ECAT SKU: 11501

US$459.00

In Stock: 167 pcs

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Products Highlight

  • 100G EDR for HPC Fabric Upgrades
  • Switch Between InfiniBand and Ethernet
  • One QSFP28 for Optics or DACs
  • Broad 1G-to-100G Ethernet Compatibility
  • EDR Auto-Negotiation Extends Cable Reach
  • PCIe Gen3 x16 for Legacy Servers

Specifications

Part Number MCX555A-ECAT(900-9X5AD-0016-ST0) Adapter Card Size HHHL
Network Connector Type 1 × QSFP28 Network Mode InfiniBand: EDR (100Gb/s); Ethernet: 100GbE
Host Interface PCIe 3.0 ×16 Technology InfiniBand: RDMA; 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 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 BracketNVIDIA/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 Bracket
Network Connector Type1 × QSFP282 × QSFP281 × QSFP282 × QSFP28
Network ModeInfiniBand: EDR (100Gb/s); Ethernet: 100GbEInfiniBand: EDR (100Gb/s); Ethernet: 100GbEEthernet: 1/10/25/40/50/100GbEEthernet: 1/10/25/40/50/100GbE
Host InterfacePCIe 3.0 ×16PCIe 3.0 ×16PCIe 3.0 ×16PCIe 3.0 ×16
TechnologyInfiniBand: RDMA; Ethernet: RoCEInfiniBand: RDMA; Ethernet: RoCEEthernet: 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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Find answers to common questions about our products.

Is MCX555A-ECAT still a good fit for brand-new AI cluster builds?

It is better suited for maintaining or expanding EDR InfiniBand and 100GbE environments, not for new HDR, NDR, or 400G-class fabrics. NVIDIA’s ConnectX-5 InfiniBand/Ethernet manual lists these OPNs as end-of-life ordering part numbers.

How is MCX555A-ECAT different from MCX556A-ECAT?

MCX555A-ECAT is the single-port QSFP28 version, while MCX556A-ECAT is the dual-port QSFP28 version. Both are ConnectX-5 VPI cards for EDR IB and 100GbE, but MCX555A-ECAT is intended for one 100G-class server link.

Can this adapter be used for HDR 200G InfiniBand or NDR?

No. MCX555A-ECAT is an EDR-generation adapter, with InfiniBand rates up to EDR and Ethernet rates up to 100GbE. For HDR 200G, NDR, or 400G networks, choose a newer ConnectX-6 or ConnectX-7 platform instead.

Is it useful when an existing cluster still has FDR or QDR InfiniBand equipment?

Yes. NVIDIA lists InfiniBand auto-negotiation support across SDR, DDR, QDR, FDR10, FDR, and EDR. That makes this card useful for mixed-generation InfiniBand maintenance or phased upgrades, as long as the switch and cable support the target speed.

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