NVIDIA Mellanox ConnectX-4 Lx EN MCX4421A-ACQN OCP 2.0
Dual-Port 25GbE SFP28 OCP 2.0 Adapter with Host Management, PCIe 3.0 x8
Host Interface
PCIe 3.0 x8
Port Count
2-port
Port Speed & Connector Type
25GbE, SFP28
Form Factor
OCP 2.0 mezzanine card
RDMA / Network Protocol
RoCE v2 (RDMA over Converged Ethernet)
Product Description
The NVIDIA Mellanox ConnectX-4 Lx EN MCX4421A-ACQN is a dual-port 25 Gigabit Ethernet adapter in the OCP 2.0 mezzanine form factor with Host Management support, effectively the dual-port counterpart to the single-port MCX4411A-ACQN. It provides a PCIe 3.0 x8 host interface, two SFP28 ports at up to 25Gb/s each, and hardware-offloaded RDMA over Converged Ethernet (RoCE v2) for low-latency, low-CPU networking. Host Management allows the platform BMC to monitor and configure the adapter out-of-band, independent of host OS state, which is valuable for remote fleet visibility in OCP-based rack-scale deployments. This SKU is also sourced as an H3C-pulled OEM part (cross-referenced as 02JK108), reflecting its use as a qualified mezzanine NIC in H3C server platforms in addition to NVIDIA channel availability. Built on the single-chip MT27712A0-FDCF-AE controller, the card retains the compact, tool-less-install OCP 2.0 form factor while providing dual-port bandwidth and BMC-level manageability.