NVIDIA Mellanox MCP4Y10-N002 InfiniBand NDR 800Gb/s Twin-Port OSFP Passive DAC, 2m: This is a 2-meter passive copper Direct Attach Cable (DAC) with OSFP connectors on both ends, designed for InfiniBand NDR fabrics in twin-port mode (800 Gb/s aggregate per OSFP, 2× 400 Gb/s NDR lanes per connector). NVIDIA P/N: 980-9IA0I-00N002. This IS a straight 1:1 OSFP-to-OSFP cable — both connectors carry the full 800G twin-port signal. This is NOT a splitter / breakout, NOT an Ethernet-only cable, and NOT an active optical assembly. This is a refurbished unit, tested by T.E.S IT-SOLUTIONS.
Engineering Context
NDR Twin-Port architecture carries two independent 400 Gb/s NDR lanes inside one OSFP connector, aggregating to 800 Gb/s per port. The cable is passive copper, so it draws 0 W, adds no DSP latency, and has deterministic signal behavior — a major advantage in synchronized AI training where jitter matters. At 2m, this DAC sits comfortably inside the passive copper reach window for 800G PAM4 over high-grade copper. The OSFP form factor provides the thermal and electrical headroom required for sustained NDR operation.
Deployment & Use Cases
Switch-to-switch and switch-to-server short-reach NDR links inside Quantum-2 fabrics. AI training clusters where NDR-class GPU servers connect to top-of-rack NDR switches. HPC supercomputer interconnects requiring deterministic low-latency 800G. Rack-internal and adjacent-rack 800G connectivity where AOC cost and power are not justified.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number (MPN): MCP4Y10-N002
NVIDIA P/N: 980-9IA0I-00N002
Cable Type: Passive Copper DAC
Connectors: OSFP to OSFP (Twin-Port, 1:1 straight)
Protocol: InfiniBand NDR
Aggregate Rate: 800 Gb/s per OSFP (2× 400 Gb/s NDR lanes)
Length: 2 m
Power Consumption: 0 W (passive)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Designed for NVIDIA Quantum-2 NDR InfiniBand switches and NDR-class adapters (e.g., ConnectX-7 NDR) with OSFP cages configured for twin-port NDR mode. Both endpoints must be capable of OSFP twin-port operation; mismatched single-port (400G) and twin-port (800G) endpoints will negotiate down or fail to link. This SKU is primarily an InfiniBand NDR cable — Ethernet (NDR-Ethernet/800GbE) operation depends on switch firmware and port mode and should be verified against your platform's release notes. This is a straight cable, not a splitter; for 800G→2× 400G fan-out, use the MCP7Y00 family.
Why T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS validates EEPROM identity, signal continuity, and twin-port lane mapping on every NDR DAC before shipment. Handling time is 1–3 business days, with global shipping and engineer-led NDR fabric guidance.