NVIDIA Mellanox MCP7Y00-N003 800Gb/s NDR Passive Copper Splitter, OSFP to 2x OSFP, 3m: This is a 3-meter passive copper Direct Attach Cable (DAC) splitter that breaks one 800Gb/s OSFP NDR port into two independent 400Gb/s OSFP links. NVIDIA P/N: 980-9I80P-00N003. This is a passive copper assembly with no DSP, retimers, or active optics. This is NOT a transceiver, AOC, or 400GbE QSFP-DD Ethernet breakout. This is a refurbished unit, electrically tested and inspected by T.E.S IT-SOLUTIONS.
Engineering Context
The MCP7Y00-N003 uses 28 AWG twinax conductors with PAM4 lane signaling at 100Gb/s per lane. The upstream OSFP carries 8 PAM4 lanes (8x100Gb/s = 800Gb/s NDR), and the splitter remaps these into 2x OSFP connectors of 4 lanes each (4x100Gb/s = 400Gb/s per leg). The cable is rated for InfiniBand NDR signaling and has an LSZH jacket for data center fire-safety compliance. Pulltab color is black. As a passive cable, it draws no power and adds negligible insertion latency compared with optical alternatives.
Deployment & Use Cases
Used in NVIDIA Quantum-2 (NDR) OSFP switches breaking out to OSFP NDR endpoints such as ConnectX-7 OSFP NICs. Common in AI and LLM training pods where 800G NDR spines connect to 400G compute leaves. Useful during 400G to 800G fabric migrations where existing 400G endpoints must remain in service. Suited to adjacent-rack runs where 3 meters fits between Top-of-Rack switch and OSFP NIC endpoints in nearby racks.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number (MPN): MCP7Y00-N003
NVIDIA P/N: 980-9I80P-00N003
Form Factor: OSFP (upstream) to 2x OSFP (downstream)
Cable Type: Passive Copper Splitter DAC
Data Rate: 800Gb/s NDR split into 2x 400Gb/s
Lane Signaling: PAM4, 100Gb/s per lane
Length: 3 meters
Conductor: 28 AWG
Jacket: LSZH (Low Smoke Zero Halogen)
Pulltab Color: Black
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Compatible with NVIDIA Quantum-2 NDR OSFP switches when the OSFP port is configured for 2x 400G breakout mode, and with OSFP NDR network adapters such as ConnectX-7 OSFP cards. Not compatible with QSFP-DD 400GbE Ethernet switches, QSFP56 HDR adapters, or non-NDR InfiniBand fabrics. Both downstream legs must terminate in 400G PAM4-capable endpoints; mixing into 100G NRZ ports is not supported. This is a fixed-length factory assembly — no field re-termination.
Why T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS electrically validates each splitter at NDR PAM4 speeds, verifies lane mapping per downstream leg, and inspects connector keying before shipment. We provide expert consultation on NVIDIA Quantum-2 fabric design, global shipping, and 1–3 day handling. Visit T.E.S IT-SOLUTIONS.