NVIDIA Mellanox MCX623105AN-VDAT ConnectX-6 Dx EN Adapter, 200GbE, Single-Port QSFP56, PCIe Gen4 x16, No Crypto: This enterprise network interface card (NIC) is the NVIDIA Mellanox ConnectX-6 Dx, part number MCX623105AN-VDAT (NVIDIA P/N 900-9X6AG-0018-ST0). It is a single-port 200GbE Ethernet adapter based on the ConnectX-6 Dx ASIC. The VDAT variant indicates: V = no crypto hardware acceleration, D = Dx series (Ethernet-only), A = OPN revision, T = Tall bracket. This is a new unit, factory sealed.
Engineering Context
The ConnectX-6 Dx delivers up to 200 Gb/s Ethernet throughput through a single QSFP56 port over a PCIe Gen4 x16 host interface (256 Gb/s bidirectional bandwidth). The Dx series is Ethernet-only (no InfiniBand support) with advanced hardware offloads including RoCE v2, VXLAN/NVGRE encapsulation, SR-IOV (up to 1024 VFs), and hardware-based flow steering. The adapter supports DPDK for user-space packet processing and OVS offload for virtualized networking. NVMe-oF offload enables RDMA-based storage networking at line rate. The no-crypto variant (V prefix) omits hardware-accelerated IPsec and TLS offload.
Deployment & Use Cases
200GbE server connectivity for AI/ML training clusters running NCCL over RoCE v2. Cloud and hyperscale data center Ethernet fabrics with OVS hardware offload. NVMe-over-Fabrics storage networking for disaggregated storage architectures. High-throughput virtualized environments on VMware ESXi or KVM with SR-IOV pass-through. Deployments in crypto-restricted regions or compliance environments where hardware crypto is not permitted.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCX623105AN-VDAT
NVIDIA P/N: 900-9X6AG-0018-ST0
ASIC: ConnectX-6 Dx
Type: Ethernet Network Adapter (NIC)
Speed: 200GbE (also supports 100/50/25/10GbE)
Ports: 1x QSFP56
Host Interface: PCIe Gen4 x16
Protocols: RoCE v2, VXLAN, NVGRE, SR-IOV, DPDK, NVMe-oF
Crypto: Disabled (no hardware IPsec/TLS offload)
Bracket: Tall (Full-Height)
Form Factor: Single-slot, full-height
Condition: New — Factory Sealed
Compatibility & Hard Constraints
Ethernet Only: ConnectX-6 Dx does not support InfiniBand. For InfiniBand, use ConnectX-6 VPI (HDR) variants such as the MCX653105A series. No Crypto: This VDAT variant cannot perform hardware-offloaded IPsec or TLS. If crypto offload is needed, use the CDAT variant (with crypto enabled). PCIe Gen4 x16: Requires a physical x16 slot for full 200GbE bandwidth. Will function in Gen3 slots at reduced bandwidth. Single Port: One QSFP56 port. For dual-port 200GbE, use MCX623106AN series. Tall Bracket: Full-height bracket. Low-profile servers require a bracket swap or low-profile variant.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS supplies new, factory-sealed ConnectX-6 Dx adapters with full manufacturer warranty eligibility. We provide expert consultation for NIC selection, firmware guidance, and network architecture planning. Global shipping with 1–3 business day handling and full tracking.