HP-branded InfiniBand FDR passive copper cable — the HP 670759-B22 is a 1-meter QSFP passive copper cable (DAC) rated for InfiniBand FDR at 56Gb/s. MPN: 670759-B22. This product IS a passive copper DAC cable for IB FDR connections; it is NOT an active fiber cable (AOC), NOT compatible with EDR (100Gb/s) InfiniBand switches, and NOT compatible with QSFP28 (EDR/100GbE) ports. OEM: HP (HPE). Condition: refurbished.
Engineering Context
The 670759-B22 carries InfiniBand FDR signaling at 14.0625 Gb/s per lane across 4 lanes for an aggregate of 56Gb/s. At 1 meter and passive copper construction, it operates well within the passive copper reach budget for FDR IB, providing low latency (μs-range) with no active components and therefore zero active power draw. The QSFP connector (not QSFP28) is keyed for the FDR generation of InfiniBand hardware. HP branded the 670759-B22 for use with HP ProLiant servers equipped with IB HCAs, but it is standard Mellanox-compatible IB FDR copper.
Deployment & Use Cases
Designed for InfiniBand FDR fabric deployments connecting server HCAs to leaf switches within the same rack. Used in HP ProLiant blade and rack server environments with FDR IB HCAs for MPI-based HPC workloads. Suitable for short-reach node-to-switch or switch-to-switch connections (within 1m) in Lustre storage networks and parallel compute clusters. Appropriate for VMware ESXi environments using IB FDR for RDMA-based shared storage connectivity. The 1m length is optimal for top-of-rack in dense rack configurations where server and switch are in the same bay.
Technical Specifications
MPN: 670759-B22
OEM: HP (HPE)
Cable Type: Passive Copper (DAC)
InfiniBand Speed: 56Gb/s (FDR)
Lane Rate: 14.0625 Gb/s per lane (4 lanes)
Connectors: QSFP (both ends — not QSFP28)
Cable Length: 1 meter
Active Components: None (passive)
Power Draw: 0W active
Condition: Refurbished
Compatibility & Constraints
Compatible with QSFP FDR ports on HP ProLiant servers with IB HCAs, and with standard NVIDIA Mellanox FDR InfiniBand switches (SX6036, SX6012, SX6025). Also compatible with ConnectX-3 and ConnectX-3 Pro HCAs with QSFP FDR ports. The 670759-B22 uses QSFP connectors and is NOT compatible with QSFP28 (EDR/HDR/100GbE) ports — QSFP28 has a different electrical spec. NOT compatible with EDR (100Gb/s) IB switches. NOT compatible with QDR (40Gb/s) switches without protocol negotiation. NOT compatible with QSFP+ 40GbE Ethernet ports. Predecessor: HP QDR copper cable (various); successor: HP/HPE EDR cable (various MPNs). FDR generation cables are not forward-compatible with EDR switches at FDR speed.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS tests all passive copper cables for electrical continuity and connector integrity prior to dispatch. Lab-verified stock, 1–3 business day handling, global shipping. Technical consultation available for IB fabric cable planning. Visit tes-itsolutions.com.