NVIDIA Mellanox ConnectX-6 Dx MCX623105AC-VDAT
ConnectX-6 Dx EN, 1-port 200GbE, Secure Boot + Crypto offload
Host Interface
PCIe 4.0 x16
Port Count
1-port
Secure Boot
Supported (hardware root-of-trust firmware authentication)
Port Speed & Connector Type
200Gb Ethernet, QSFP56
Network Protocol / RDMA
Ethernet, RoCE v2
Product Description
The NVIDIA Mellanox ConnectX-6 Dx EN adapter (MCX623105AC-VDAT) is a single-port 200GbE card built on the cloud-optimized ConnectX-6 Dx ASIC and connected via a PCIe 4.0 x16 host interface. This is the security-hardened SKU in the ConnectX-6 Dx 200GbE family: it adds a hardware root-of-trust with Secure Boot, which authenticates adapter firmware before it loads, and inline hardware Crypto offload for IPsec/TLS, which encrypts and decrypts network traffic in the NIC rather than on the host CPU. Combined with RDMA over Converged Ethernet (RoCE v2), ASAP^2 hardware offloads for virtual switching, and SR-IOV-based I/O virtualization, the MCX623105AC-VDAT is purpose-built for multi-tenant cloud and hyperscale environments where both throughput and data-in-flight security matter. It gives operators a single 200Gb port for storage, compute, and management traffic while keeping encryption and firmware integrity checks off the host CPU, preserving cores for tenant workloads.