HP 670760-B25 12m FDR 56Gb/s QSFP+ Active Optical Cable: This is a 12-meter Active Optical Cable (AOC) terminated with QSFP+ connectors on both ends. It supports FDR InfiniBand at 56Gb/s (4x 14Gb/s) and is HP's branded interconnect for HP InfiniBand FDR fabrics. The cable uses VCSEL-based optics inside the QSFP+ connectors driving multi-mode fiber. This is an active optical cable assembly, not a passive copper DAC and not a transceiver-plus-patch-cord pair. This is a refurbished unit.
Engineering Context
The 670760-B25 is HP's part number for a 12-meter QSFP+ FDR AOC. At 12 meters, it bridges spans where passive copper FDR DACs cannot maintain signal integrity (passive FDR is typically limited to 3m or less). The active optical design provides full EMI immunity and significantly lighter weight than a copper bundle of equivalent reach. Each cable end integrates VCSEL optics and driver electronics that draw power from the host QSFP+ port.
Deployment & Use Cases
HP-branded FDR InfiniBand fabric runs in HPC clusters using HP ProLiant servers and HP InfiniBand FDR switches. End-of-row connectivity in HP-standardized data centers. MPI compute-fabric links between HP BladeSystem chassis and FDR core switches. Inter-row 56Gb/s links exceeding the reach of passive copper.
Technical Specifications
- OEM: HP (Hewlett Packard Enterprise)
- HP Part Number: 670760-B25
- Form Factor: QSFP+ to QSFP+ Active Optical Cable
- Cable Length: 12 meters
- Data Rate: FDR 56Gb/s (4x 14Gb/s lanes)
- Cable Type: Active Optical Cable (AOC)
- Fiber Type: Multi-mode (integrated, fixed)
- Optics: VCSEL-based, integrated into QSFP+ ends
- Protocol: InfiniBand FDR
- Power Draw: Drawn from host QSFP+ port
- Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Designed for HP InfiniBand FDR switches and HP-supported FDR HCAs. Functionally compatible with Mellanox FDR QSFP+ ports on Mellanox SX6000-series switches and ConnectX-3 FDR adapters, since HP's FDR cables are Mellanox-derived. Both ends require QSFP+ ports configured for FDR. Not a breakout cable; QSFP+ to QSFP+ point-to-point only. Fixed integrated fiber — cannot replace a damaged jumper. Not compatible with EDR (100Gb/s) ports unless the switch supports backwards-compatible FDR negotiation. Length is fixed at 12m.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS tests every AOC for optical power, lane integrity, and connector condition before shipment. Visit www.tes-itsolutions.com for HP and Mellanox FDR cable inventory. We offer global shipping with 1–3 day handling.