ConnectX-5 NICs
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- 25GE
- SFP28
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- PCIe 3.0 x8
NVIDIA/Mellanox MCX512A-ACAT Mellanox ConnectX®-5 EN Network Interface Card, 25GbE Dual-port SFP28, PCIe Gen 3.0×8, Tall Bracket
MCX512A-ACAT
In Stock Ready to Ship
US$409.00 -
Hot
- 100GE
- QSFP28
- Single-port
- PCIe 3.0 x16
NVIDIA/Mellanox MCX515A-CCAT Mellanox ConnectX®-5 EN Network Interface Card, 100GbE Single-port QSFP28, PCIe Gen 3.0×16, Tall Bracket
MCX515A-CCAT
In Stock Ready to Ship
US$399.00 -
Hot
- InfiniBand EDR
- QSFP28
- Single-port
- PCIe 3.0 x16
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
MCX555A-ECAT
In Stock Ready to Ship
US$459.00 -
- 100GE
- QSFP28
- Dual-port
- PCIe 3.0 x16
NVIDIA/Mellanox MCX516A-CCAT Mellanox ConnectX®-5 EN Network Interface Card, 100GbE Dual-port QSFP28, PCIe Gen 3.0×16, Tall Bracket
MCX516A-CCAT
In Stock Ready to Ship
US$839.00 -
- InfiniBand EDR
- QSFP28
- Dual-port
- PCIe 3.0 x16
NVIDIA/Mellanox MCX556A-ECAT Mellanox ConnectX®-5 VPI Adapter Card, EDR IB (100Gb/s) and 100GbE, Dual-port QSFP28, PCIe 3.0×16, Tall Bracket
MCX556A-ECAT
In Stock Ready to Ship
US$529.00
ConnectX-5 NICs Overview
ConnectX-5 NICs includes five NVIDIA Mellanox server adapters across the ConnectX-5 VPI and ConnectX-5 EN families. The VPI models provide EDR InfiniBand and 100GbE connectivity through single- or dual-port QSFP28 interfaces, while the EN models support Ethernet speeds from 1GbE to 100GbE through SFP28 or QSFP28 ports. All five are low-profile PCIe Gen3 adapters supplied with tall brackets. Configurations differ in network protocol, port count, connector type, maximum port speed, and PCIe interface width for server and data center networking.
MCX555A-ECAT is a ConnectX-5 VPI adapter with one QSFP28 port supporting EDR InfiniBand at 100Gb/s and Ethernet speeds up to 100GbE. It uses a PCIe Gen3 x16 host interface and is supplied with a tall bracket. The single-port configuration provides protocol-selectable InfiniBand or Ethernet connectivity for servers connected to 100Gb/s networks.
MCX556A-ECAT is a dual-port ConnectX-5 VPI adapter with two QSFP28 interfaces supporting EDR InfiniBand and Ethernet at up to 100Gb/s per port. The card connects through PCIe Gen3 x16 and includes a tall bracket. Its two VPI ports provide InfiniBand or Ethernet connectivity for servers requiring multiple high-speed network links.
MCX512A-ACAT is a ConnectX-5 EN adapter with two SFP28 Ethernet ports supporting 1GbE, 10GbE, and 25GbE. It uses a PCIe Gen3 x8 host interface and is supplied with a tall bracket. The dual-port configuration supports server connections to 10GbE and 25GbE access, aggregation, and data center Ethernet networks.
MCX515A-CCAT is a single-port ConnectX-5 EN adapter with one QSFP28 interface supporting Ethernet rates from 1GbE to 100GbE. It connects to the host through PCIe Gen3 x16 and includes a tall bracket. The adapter provides one high-speed Ethernet interface for servers operating in 40GbE, 50GbE, or 100GbE network environments.
MCX516A-CCAT is a dual-port ConnectX-5 EN adapter with two QSFP28 interfaces supporting Ethernet speeds from 1GbE to 100GbE per port. It uses a PCIe Gen3 x16 host connection and is supplied with a tall bracket. Its dual-port architecture supports servers requiring two 100GbE-capable Ethernet links through a single adapter.
FAQ
- How do the MCX555A-ECAT and MCX556A-ECAT differ in port count while retaining the same VPI network capabilities?
MCX555A-ECAT provides one QSFP28 port, while MCX556A-ECAT provides two QSFP28 ports. Both support EDR InfiniBand at 100Gb/s and Ethernet up to 100GbE through a PCIe Gen3 x16 host interface.
- Can the MCX555A-ECAT and MCX556A-ECAT operate on both InfiniBand and Ethernet networks?
Yes. Both are ConnectX-5 VPI adapters supporting InfiniBand rates from SDR through EDR and Ethernet rates of 1, 10, 25, 40, 50, and 100Gb/s. Their QSFP28 ports can connect through supported copper or optical media.
- Which model in the ConnectX-5 NICs category uses dual SFP28 ports instead of QSFP28, and what Ethernet rates does it support?
MCX512A-ACAT uses two SFP28 Ethernet ports. It supports 1GbE, 10GbE, and 25GbE operation and connects to the server through a PCIe Gen3 x8 interface.
- What is the main configuration difference between the MCX515A-CCAT and MCX516A-CCAT Ethernet adapters?
MCX515A-CCAT has one QSFP28 port, while MCX516A-CCAT has two QSFP28 ports. Both support Ethernet rates of 1, 10, 25, 40, 50, and 100Gb/s and use PCIe Gen3 x16 interfaces.
- Which model in the ConnectX-5 NICs category uses PCIe Gen3 x8 rather than PCIe Gen3 x16?
MCX512A-ACAT uses PCIe Gen3 x8. The MCX555A-ECAT, MCX556A-ECAT, MCX515A-CCAT, and MCX516A-CCAT models use PCIe Gen3 x16 host interfaces.
- Can the MCX515A-CCAT and MCX516A-CCAT connect directly to an InfiniBand network?
No. MCX515A-CCAT and MCX516A-CCAT are ConnectX-5 EN adapters designed for Ethernet. InfiniBand connectivity is provided by the VPI models MCX555A-ECAT and MCX556A-ECAT in this category.
- Can the MCX556A-ECAT and MCX516A-CCAT deliver 200Gb/s of aggregate host throughput when both ports operate at 100Gb/s?
No. Both cards can establish two 100Gb/s network links, but their PCIe Gen3 x16 interfaces provide a documented maximum bandwidth of 128Gb/s and cannot carry 200Gb/s of aggregate host traffic.
- What card profile and bracket configuration do the listed ConnectX-5 NICs use for server installation?
All five are low-profile PCIe adapter cards supplied with tall brackets. The NVIDIA specification tables list a card size of 68.90mm × 142.24mm for these ConnectX-5 configurations.
