NVIDIA Mellanox MHQH19B-XTR ConnectX-2 VPI Adapter, Single-Port QSFP, QDR/DDR InfiniBand (40/20Gb/s) or 10GbE Ethernet, PCIe 2.0 x8: This enterprise network interface card (NIC) is the NVIDIA Mellanox ConnectX-2, part number MHQH19B-XTR. It is a single-port VPI (Virtual Protocol Interconnect) adapter with a QSFP port that can be configured for either InfiniBand (QDR 40Gb/s or DDR 20Gb/s) or Ethernet (10GbE) at driver load time. The XTR suffix indicates VPI capability with a tall bracket. This is a refurbished unit, tested by T.E.S IT-SOLUTIONS.
Engineering Context
The MHQH19B-XTR is the single-port variant of the ConnectX-2 VPI adapter family, delivering up to 40 Gb/s (QDR) or 20 Gb/s (DDR) in InfiniBand mode, or 10 Gb/s in Ethernet mode. The PCIe 2.0 x8 interface provides 40 Gb/s bidirectional bandwidth, sufficient for one QDR port. VPI allows runtime protocol switching between InfiniBand and Ethernet without hardware changes, configured via driver parameters at load time. Power consumption is typically under 15W. This is a legacy-generation ASIC succeeded by ConnectX-3, ConnectX-4, ConnectX-5, ConnectX-6, and ConnectX-7.
Deployment & Use Cases
Legacy HPC clusters requiring single-port QDR InfiniBand connectivity for MPI workloads. Mixed protocol environments requiring InfiniBand or Ethernet flexibility without NIC swaps. Budget-conscious deployments where one port per server is sufficient. Lab and test environments for InfiniBand or Ethernet protocol development and driver testing.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MHQH19B-XTR
ASIC: ConnectX-2
Type: VPI Adapter (InfiniBand + Ethernet)
InfiniBand Speed: QDR 40Gb/s / DDR 20Gb/s
Ethernet Speed: 10GbE
Ports: 1x QSFP
Host Interface: PCIe 2.0 x8
Power Consumption: ~15W typical
Bracket: Tall (Full-Height)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Legacy Generation: ConnectX-2 is end-of-life. The mlx4 driver is included in current Linux kernels but some newer OS versions may have limited or deprecated support. Verify driver availability before deployment. QDR Maximum: InfiniBand speed is limited to QDR (40Gb/s). Not compatible with FDR, EDR, HDR, or NDR at native speeds. QSFP Port: Accepts original QSFP InfiniBand cables/transceivers or 40GbE QSFP modules. Not compatible with QSFP+, QSFP28, or QSFP56 form factors. PCIe 2.0 x8: Will function in PCIe 3.0/4.0 slots but limited to PCIe 2.0 bandwidth. Single Port: One QSFP port only. For dual-port, use MHQH29C-XTR. Predecessor: ConnectX (original). Successor: ConnectX-3 (FDR).
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS tests every refurbished ConnectX-2 adapter for port connectivity, PCIe link negotiation, and firmware integrity before shipment. We provide expert guidance on legacy networking, global shipping with 1–3 business day handling, and full tracking.