NVIDIA Mellanox ConnectX-5 MCX566A-CDAB OCP3.0
ConnectX-5 Ex EN, dual-port 100GbE OCP 3.0 adapter, PCIe 4.0 x16
Form Factor
OCP 3.0 Small Form Factor (SFF)
Host Interface
PCIe 4.0 x16
Port Count
2-port
Port Speed & Connector Type
100GbE, QSFP28
Network Protocol
Ethernet (EN) only
Product Description
The NVIDIA Mellanox ConnectX-5 MCX566A-CDAB is a ConnectX-5 Ex Ethernet Networking (EN) adapter in the OCP 3.0 form factor, sharing the same dual-port 100GbE QSFP28 configuration and PCIe 4.0 x16 host interface as the MCX566A-CDAI, but ordered under a distinct NVIDIA SKU/packaging option (900-9X556-0056-SB0). Built around the MT28808A0-FCCF-CE controller, the card is intended for hyperscale and cloud server designs that use the OCP 3.0 mezzanine connector rather than a standard full-height PCIe bracket, enabling tool-less, hot-swappable NIC serviceability at rack scale. It supports RoCE v2 for CPU-offloaded RDMA networking, NVMe-oF acceleration for disaggregated storage, and embedded eSwitch/SR-IOV offload for secure multi-tenant virtualization. As with other ConnectX-5 Ex EN adapters, it targets data center operators who need consistent 100Gb Ethernet throughput with minimal CPU overhead across large, homogeneous server fleets.