W.L. Gore & Associates IBN4800-01 REV D CX4 QDR InfiniBand Copper Cable, 1m: This is a 1-meter passive copper cable with CX4 connectors on both ends, supporting InfiniBand QDR (40 Gb/s) and 10 Gigabit Ethernet (CX4 / 10GBASE-CX4). The cable is a fixed-length integrated assembly; it is not a transceiver pair with a removable patch cord. This listing is a lot of 5 refurbished units, tested by T.E.S IT-SOLUTIONS.
Engineering Context
The IBN4800 series is a Gore-engineered Eye Opener cable assembly using twin-axial copper construction. CX4 is a 4-pair connector standardized for InfiniBand SDR/DDR/QDR and for 10GBASE-CX4 Ethernet, predating the QSFP and SFP+ form factors. At 1 m, the cable comfortably meets QDR signal-integrity requirements (10 Gb/s per lane, four lanes, 40 Gb/s aggregate). The Eye Opener construction is intended to provide consistent rise/fall characteristics across the four differential pairs to help meet the BER targets defined in the InfiniBand QDR specification.
Deployment & Use Cases
Legacy InfiniBand QDR HPC clusters running ConnectX-2 IB or older Mellanox/Voltaire CX4 switches (e.g., Voltaire 4036). 10GBASE-CX4 Ethernet uplinks on early 10GbE switches that pre-date SFP+ DACs. Server-to-storage links in legacy SAN/NAS deployments using CX4 ports. Lab and bench tooling for archival validation of CX4-era hardware. Drop-in replacement where original Gore IBN4800 cables have failed or are missing.
Technical Specifications
OEM: W.L. Gore & Associates
Part Number: IBN4800-01 REV D
Form Factor: CX4 to CX4 (Point-to-Point)
Data Rate: 40 Gb/s aggregate (4x10 Gb/s) for QDR; 10 Gb/s for 10GBASE-CX4
Cable Type: Passive Copper (Twin-axial)
Length: 1 m
Protocols: InfiniBand QDR, 10GBASE-CX4 Ethernet
Conductor: Copper
Lot Quantity: 5 units
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with CX4 ports on legacy InfiniBand QDR switches and HCAs (including ConnectX-2 IB CX4-port variants and Voltaire 4036 / Mellanox MTS3600 generation hardware) and with 10GBASE-CX4 Ethernet ports on early 10GbE switches. Fixed 1 m length. Passive copper only — no retimer or active conditioning. Not compatible with QSFP, QSFP+, or QSFP28 ports without a CX4-to-QSFP converter (CX4 is mechanically and electrically distinct from QSFP-family connectors). Not compatible with SFP+ ports. Not certified for FDR (56 Gb/s) or EDR (100 Gb/s) operation.
Why Choose T.E.S IT-SOLUTIONS
Each refurbished unit is link-tested at QDR before shipment. T.E.S IT-SOLUTIONS handles orders within 1–3 days and specializes in keeping legacy InfiniBand and CX4-era fabrics operational with tested replacement cables.