NVIDIA Mellanox MCX613105A-VDAT ConnectX-6 EN Adapter — Single QSFP56, 200GbE, PCIe 4.0 x16: This is a ConnectX-6 EN Ethernet-only network adapter with a single QSFP56 port running up to 200Gb/s Ethernet. This is an Ethernet host adapter (NIC), not a VPI card with InfiniBand protocol support and not a SmartNIC. This is a refurbished unit, fully tested by T.E.S IT-SOLUTIONS prior to shipment.
Engineering Context
The ConnectX-6 EN ASIC drives the QSFP56 port at up to 200GbE using 4 lanes of 50Gb/s PAM4. PCIe 4.0 x16 supplies approximately 32 GB/s of usable bidirectional host bandwidth — enough to sustain a 200Gb/s stream without saturating the bus. The card supports RoCEv2 RDMA, NVMe-over-Fabrics, SR-IOV with up to 1,024 virtual functions, and stateless offloads (TSO, LSO, RSS, checksum). Backward compatibility with PCIe Gen3 x16 lets the card operate at reduced bandwidth in older servers. The HHHL form factor with tall bracket fits standard 1U/2U server chassis.
Deployment & Use Cases
200GbE leaf-spine fabrics for AI training and inference clusters. NVMe-oF target hosts requiring high-throughput RDMA. Hyperscale storage backends serving distributed file systems (Lustre, BeeGFS, Ceph). Single-port deployments where rack density and slot count matter more than per-server redundancy.
Technical Specifications
- OEM: NVIDIA Mellanox
- Part Number: MCX613105A-VDAT
- ASIC / Generation: ConnectX-6 EN
- Ports: Single QSFP56
- Port Speed: 200GbE
- Host Interface: PCIe 4.0 x16
- Protocol: Ethernet
- RDMA / Offloads: RoCEv2, NVMe-oF, SR-IOV, stateless TCP offloads
- Form Factor: HHHL (Half-Height Half-Length) with tall bracket
- Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Compatible with NVIDIA Spectrum-2/Spectrum-3 200GbE switches (SN3700, SN4700) and third-party switches that interoperate with QSFP56 200GbE optics, AOCs, or DACs. Requires a free PCIe Gen4 x16 slot to reach full 200Gb/s; Gen3 x16 caps host bandwidth around 16 GB/s. This is the EN (Ethernet-only) variant — does NOT support InfiniBand protocol. Does NOT include hardware crypto offload (this is the non-crypto -VDAT SKU). Tall bracket only; no low-profile bracket included.
Why T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS specializes in refurbished NVIDIA Mellanox enterprise networking hardware. Every NIC is bench-tested for PCIe link training, port stability, and firmware integrity prior to shipment. We provide deployment consultation on cabling, switch compatibility, and driver/firmware combinations, with international shipping and a 1–3 business day handling time. Visit tes-itsolutions.com for the full inventory and technical contact.