NVIDIA Mellanox MCX566A-CDAI ConnectX-5 Ex EN 100GbE Dual-Port QSFP28 OCP 3.0 Network Adapter: This is a dual-port 100Gb/s Ethernet OCP 3.0 SFF (Small Form Factor) network interface card based on the ConnectX-5 Ex ASIC, with a PCIe Gen 4.0 x16 host interface and an internal lock bracket. This is an OCP 3.0 form-factor adapter; it is not a standard PCIe HHHL card. This is a new (factory-sealed) unit.
Engineering Context
The MCX566A-CDAI delivers up to 200 Gb/s of aggregate Ethernet throughput across two QSFP28 ports. PCIe Gen 4.0 x16 provides ~256 Gb/s of host bandwidth, ensuring both ports can run at full 100GbE simultaneously. The OCP 3.0 SFF form factor is designed for hyperscale and enterprise servers that follow the Open Compute Project standard, supporting host management and tool-less serviceability via the internal lock bracket. ConnectX-5 Ex offloads include RoCE v2, NVMe-oF, GPUDirect RDMA, and overlay tunnels (VXLAN, Geneve, NVGRE).
Deployment & Use Cases
Hyperscale and OCP-aligned data center servers requiring dual 100GbE uplinks. AI/ML training nodes using RoCE v2 across GPU clusters. NVMe-over-Fabrics storage initiators and targets. Software-defined networking with hardware-accelerated VXLAN/Geneve tunnel encap/decap. Multi-tenant virtualization with SR-IOV and VirtIO acceleration.
Technical Specifications
- OEM: NVIDIA Mellanox
- Part Number: MCX566A-CDAI
- Product Family: ConnectX-5 Ex EN
- Ports: 2 × QSFP28
- Max Data Rate: 100GbE per port (200 Gb/s aggregate)
- Host Interface: PCIe Gen 4.0 x16
- Protocol: Ethernet (10/25/40/50/100GbE)
- Form Factor: OCP 3.0 SFF, Internal Lock bracket
- Host Management: Yes
- Offloads: RoCE v2, Overlay (VXLAN/Geneve/NVGRE), TCP/UDP/IP stateless, T10-DIF, NVMe-oF
- Virtualization: SR-IOV, VirtIO acceleration
- Condition: New
Compatibility & Hard Constraints
Compatible with servers that provide an OCP 3.0 SFF slot with PCIe Gen 4.0 x16 wiring (or Gen 3.0 x16 at reduced bandwidth). Pairs with NVIDIA Spectrum SN2000/SN3000/SN4000 switches and 100GbE-capable QSFP28 transceivers, AOCs, and DACs. This is an Ethernet-only (EN) adapter; it does not run InfiniBand. Will not install in a standard PCIe HHHL slot. The internal lock bracket is fixed to the OCP 3.0 form factor and cannot be replaced with a tall or low-profile PCIe bracket.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS supplies new and refurbished ConnectX adapters with verified OEM packaging and bench-test reports on request. We provide expert consultation on OCP 3.0 platform compatibility, global shipping, and a typical handling time of 1–3 business days.