NVIDIA MCX755106AS-HEAT ConnectX-7 200GbE / NDR200 InfiniBand Dual QSFP112 PCIe 5.0 x16 (Refurbished)
Technical Identity
The NVIDIA Mellanox MCX755106AS-HEAT is a refurbished ConnectX-7 Network Interface Card (NIC). It provides 200GbE Ethernet or NDR200 InfiniBand connectivity via two QSFP112 ports, with a PCIe 5.0 x16 host interface in HHHL (Half-Height, Half-Length) form factor. As a VPI dual-protocol adapter, each port can be independently configured for Ethernet or InfiniBand. Supports 200/100/50/40/25/10/1GbE Ethernet and NDR200/HDR/HDR100/EDR InfiniBand link speeds. Crypto Disabled, Secure Boot Enabled. PCIe 5.0 x16 also supports x16 PCIe extension for Socket-Direct configurations. Condition: Refurbished.
Product Classification

Brand: NVIDIA Mellanox
Model / MPN: MCX755106AS-HEAT
Product family: ConnectX-7
Product type: Network Interface Card (NIC)
Network ports: 2x QSFP112
Per-port speed: 200GbE Ethernet / NDR200 InfiniBand
Host interface: PCIe 5.0 x16 (backward compatible with Gen 4.0, 3.0)
Form factor: HHHL (Half-Height, Half-Length)
Cryptography: Disabled
Secure Boot: Enabled
Condition: Refurbished

Key Features

PCIe 5.0 x16 - highest available PCIe bandwidth for AI training, HPC, and GPU-dense server deployments
200GbE / NDR200 dual QSFP112 - direct path to Quantum-2 InfiniBand and Spectrum-4 Ethernet switches
VPI dual-protocol - independent per-port Ethernet or InfiniBand configuration via firmware
RDMA over Converged Ethernet (RoCE v2) for zero-copy, CPU-bypass data transfers
GPUDirect RDMA - direct NIC-to-GPU transfers for AI training and inference workloads
SR-IOV and ASAP2 (Accelerated Switch and Packet Processing) for hardware-accelerated OVS/NFV
NVMe over Fabrics (NVMe-oF) target and initiator offloads
PTP hardware clock (PHC) for sub-microsecond timing accuracy
Secure Boot enabled for verified firmware boot chain

What This Is NOT

NOT a standalone server, storage device, or compute unit
NOT a switch or router - this is a host network adapter for PCIe server installation
NOT supplied with cables, transceivers, or optical modules unless explicitly stated
NOT a BlueField DPU - the MCX755106AS-HEAT is a ConnectX-7 NIC without DPU Arm cores or onboard DRAM
NOT a replacement for a different MPN - verify exact part number, PCIe slot, and software support before ordering

Compatibility and Hard Constraints

Requires a server PCIe 5.0 x16 slot for full dual-port 200GbE/NDR200 throughput; backward compatible with PCIe 4.0/3.0 at reduced bandwidth
Pairs with Quantum-2 (QM9700/QM9790) NDR InfiniBand switches at NDR200 speed
Pairs with Spectrum-4 (SN5600) 800GbE Ethernet switches and Spectrum-3 (SN4000) 400GbE Ethernet switches at 200GbE breakout
Requires QSFP112 transceivers or QSFP112 DAC/AOC cables; not electrically compatible with QSFP56/QSFP28/OSFP without adapters
OS/driver support: MLNX_OFED (Linux), WinOF-2 (Windows), VMware ESXi native driver
Firmware update via NVIDIA mlxup utility recommended after installation
Typical platforms: NVIDIA DGX and HGX AI servers, dual-socket Intel Xeon Sapphire/Emerald Rapids and AMD EPYC Genoa/Bergamo servers with PCIe 5.0

Frequently Asked Questions
What is the MCX755106AS-HEAT?
The MCX755106AS-HEAT is a refurbished NVIDIA ConnectX-7 dual-port QSFP112 network adapter card. It provides 200GbE Ethernet or NDR200 InfiniBand connectivity with a PCIe 5.0 x16 host interface, designed for AI, HPC, cloud, and enterprise data-center servers.
What speed does this card support?
Each QSFP112 port supports up to 200GbE Ethernet or NDR200 InfiniBand (200Gb/s per port). The card auto-negotiates down to 100/50/40/25/10/1GbE Ethernet and HDR/HDR100/EDR InfiniBand speeds. Full NDR400 (400Gb/s per port) is available on the -NEAT variant.
Does this support InfiniBand and Ethernet on the same card?
Yes. The MCX755106AS-HEAT is a VPI (Virtual Protocol Interconnect) dual-protocol card. Each port can be independently configured for Ethernet (200GbE) or InfiniBand (NDR200) via firmware and software settings. Default port mode is Ethernet.
What PCIe slot is required?
This card uses a PCIe 5.0 x16 host interface. It is backward compatible with PCIe 4.0 and 3.0 slots at reduced bandwidth. For full dual-port 200GbE/NDR200 performance, a PCIe 5.0 x16 slot is required.
What condition does T.E.S IT-SOLUTIONS supply?
Refurbished. Each card is inspected for connector, bracket, and label condition, verified against MPN, and packed in ESD-safe anti-static packaging for B2B shipment. Firmware update to the latest supported version is recommended after installation.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a specialist B2B reseller of NVIDIA Mellanox networking infrastructure. The MCX755106AS-HEAT is supplied with professional B2B handling: ESD-safe packaging, MPN verification, bracket and connector inspection. We provide multi-currency invoicing, global express logistics, and pre-sale technical alignment for data-center deployments. See tes-itsolutions.com.
Product Range
T.E.S IT-SOLUTIONS carries a broad portfolio of NVIDIA Mellanox network adapters across ConnectX-4, ConnectX-5, ConnectX-6, ConnectX-6 Dx, ConnectX-6 Lx, ConnectX-7, BlueField DPUs, and Innova SmartNICs. Contact us to discuss alternative MPNs, port counts, speeds, or form factors for your deployment.
Quality Assurance
All refurbished NVIDIA Mellanox adapter cards supplied by T.E.S IT-SOLUTIONS are inspected for physical condition, MPN verification, bracket integrity, and connector/port condition. Units are packed individually in ESD-safe anti-static packaging.