NVIDIA Mellanox MCC4Q28C-004 QSFP InfiniBand QDR 40Gb/s Passive Copper Cable, 4m: This is a 4-meter passive copper cable engineered for 40Gb/s InfiniBand QDR (Quad Data Rate) point-to-point interconnects. The cable uses QSFP connectors at both ends and contains no active electronics or optical components. This is a fixed-length passive copper assembly, not an active or optical cable. This is a brand-new factory-sealed unit.
Engineering Context
The MCC4Q28C-004 carries the four bonded 10Gb/s QDR lanes that form a 40Gb/s InfiniBand link. Passive construction draws 0W from the host port and contributes zero thermal load to the switch. As reach grows from 1m to longer copper spans, signal integrity becomes more critical: the 4m length is at the typical limit for QDR copper, requiring tight impedance control and shielded twinaxial pairs. The cable carries an EEPROM that identifies vendor and length to the host switch.
Deployment & Use Cases
HPC compute node to leaf switch InfiniBand QDR connectivity in mid-rack and short cross-rack spans. Storage IB QDR fabric links between filer heads and IB switch. Legacy IB QDR cluster interconnects where the existing fabric has not been upgraded to FDR or EDR. Fan-out from a QDR core switch to leaf switches within the same row.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCC4Q28C-004
Form Factor: QSFP to QSFP (Point-to-Point)
Cable Type: Passive Copper
Data Rate: InfiniBand QDR (4x 10Gb/s = 40Gb/s)
Length: 4m
Power Consumption: 0W (passive)
Lanes: 4 (4x QDR)
Protocol: InfiniBand QDR
Condition: New — Factory-sealed by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
Compatible with NVIDIA Mellanox QDR InfiniBand switches (such as the IS5000 series) and ConnectX-2 / ConnectX-3 VPI adapters operating in InfiniBand QDR mode. The cable is rated for QDR (40Gb/s) and is not guaranteed for FDR (56Gb/s) or higher signaling rates; FDR/FDR10 deployments should use the MC2207 family or newer. Not compatible with EDR (100Gb/s) QSFP28 ports or HDR (200Gb/s) ports. Cannot exceed the fixed 4m reach. Passive only — hosts must support passive QSFP DAC operation.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS verifies every cable for connector integrity and link establishment before shipment. We provide expert consultation on legacy InfiniBand QDR fabric cabling, global shipping, and a 1–3 business day handling time. Visit https://www.tes-itsolutions.com to browse our refurbished and new NVIDIA Mellanox networking inventory.