NVIDIA Mellanox MCX613106A-VDAT ConnectX-6 EN 200GbE Dual QSFP56 PCIe4 x16: The NVIDIA Mellanox MCX613106A-VDAT is a ConnectX-6 EN Ethernet-only network adapter with dual QSFP56 ports, each running up to 200GbE. The host interface is a single PCIe 4.0 ×16 slot in a full-height, full-length form factor with a tall bracket. This is an Ethernet-only EN card — it is not a VPI card and does not support InfiniBand. This is a refurbished unit.
Engineering Context
PCIe 4.0 ×16 delivers approximately 256 Gb/s of usable host bandwidth, which is shared across both 200GbE ports — sustained line rate on both ports simultaneously requires careful host-side traffic distribution. Each QSFP56 port runs 4× 50Gb/s PAM4 lanes. The card supports RDMA over Converged Ethernet v2 (RoCEv2), NVMe-oF (target and initiator), GPUDirect RDMA, hardware-accelerated VXLAN/Geneve/NVGRE tunneling, and SR-IOV with virtual functions per port. Backward compatible with PCIe 3.0 host slots at half the bus bandwidth.
Deployment & Use Cases
200GbE leaf-spine fabric in modern hyperscale data centers built on NVIDIA Spectrum-2/Spectrum-3 switches. Single-CPU AI inference and training nodes that need 200GbE Ethernet without the cost of a VPI adapter. NVMe-oF over RoCEv2 storage initiators in all-flash arrays. Cloud and virtualization hosts using SR-IOV to expose 200GbE to multiple VMs. HFT trading systems requiring deterministic Ethernet latency.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number / MPN: MCX613106A-VDAT (PN 900-9X6AF-0058-MT1)
Adapter Family: ConnectX-6 EN (Ethernet-only)
Ports: 2 × QSFP56
Data Rate: Up to 200GbE per port
Host Interface: PCIe 4.0 ×16 (backward compatible with PCIe 3.0)
Form Factor: FHFL (Full-Height, Full-Length)
Bracket: Tall
Offloads: RoCEv2, NVMe-oF, GPUDirect RDMA, VXLAN/Geneve/NVGRE, SR-IOV
Encoding: 4 × 50Gb/s PAM4 per QSFP56 port
Protocol Support: Ethernet only (no InfiniBand)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Compatible with NVIDIA Spectrum, Spectrum-2, and Spectrum-3 200GbE switches (SN3700, SN3800, SN4700). Pairs with QSFP56 DAC, AOC, or 200G transceivers. Requires a PCIe 4.0 ×16 slot for full bandwidth — works in PCIe 3.0 slots at reduced throughput. Not compatible with InfiniBand fabrics — this is an EN card, not a VPI card. Driver support requires MLNX_OFED or recent upstream Linux mlx5_core. Full-height bracket only; low-profile chassis are not supported.
Why TES
T.E.S IT-SOLUTIONS tests every ConnectX-6 EN adapter for link training on both QSFP56 ports, PCIe Gen4 negotiation, firmware integrity, and thermal sensors. Contact tes-itsolutions.com for compatibility questions, bulk pricing, and worldwide shipping. Standard handling time is 1–3 business days.