NVIDIA Mellanox MCA4J80-N002 Twin-Port 800Gb/s NDR Active Copper Cable, OSFP RHS, 2m: This is a 2-meter Twin-Port Active Copper Cable (ACC) carrying two independent 400Gb/s NDR links per OSFP connector for an aggregate 800Gb/s per cable. Both ends use OSFP RHS (Riding Heat Sink, Finned-Top) connectors required by NVIDIA Quantum-2 switch cages. This is a copper-based active cable with on-board redrivers; it is not an optical AOC and not a passive DAC. NVIDIA P/N: 980-9I60V-00N002. This is a new, factory-sealed unit.
Engineering Context
The MCA4J80-N002 implements the NDR twin-port architecture: each OSFP connector aggregates 8 differential lanes at 100Gb/s PAM4 (4 lanes per logical 400G port × 2 ports), giving 800Gb/s of usable bandwidth per cable end. Active Copper Cables embed redriver silicon at each connector to compensate copper insertion loss at NDR rates so that 2m runs are reliable, where passive DACs at 400G NDR are typically limited to 1.5m. The Finned-Top OSFP form factor is mandatory in Quantum-2 switch cages for thermal dissipation.
Deployment & Use Cases
Short-reach 800G NDR spine-leaf cabling between Quantum-2 switches (MQM9700 / MQM9790). DGX/HGX AI training cluster fabric where one Quantum-2 switch port serves two NDR endpoints via twin-port breakout. NVMe-oF and GPUDirect Storage backends over IB NDR. HPC supercomputing fabrics consolidating two 400G links into a single physical cable to reduce cable mass.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number (MPN): MCA4J80-N002
NVIDIA P/N: 980-9I60V-00N002
Cable Type: Active Copper Cable (ACC), Twin-Port
Connector: OSFP RHS (Finned-Top) on both ends
Data Rate: 2 × 400Gb/s NDR = 800Gb/s aggregate per cable
Signaling: 8 lanes × 100Gb/s PAM4 per connector
Length: 2 meters
Protocol: InfiniBand NDR
Condition: New — Factory-sealed
Compatibility & Hard Constraints
Compatible with NVIDIA Quantum-2 switches (MQM9700, MQM9790) and with NDR-capable OSFP RHS adapters in twin-port configurations. Both endpoints must accept Finned-Top OSFP — not compatible with Flat-Top OSFP cages. Twin-port operation requires the host port to be configured for twin-port (2x400G NDR) mode; in single-port mode, only one logical port will link up. Not compatible with QSFP-DD, QSFP112, or non-Quantum-2 switches. As an active copper cable, total reach beyond 2m is not supported by this part number.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS verifies link integrity at NDR and validates twin-port lane mapping on every cable before shipment. We provide compatibility consultation for Quantum-2 fabric builds, global shipping with handling time of 1–3 business days, and direct technical support for AI/HPC fabric design. Visit www.tes-itsolutions.com for the full inventory.