NVIDIA Mellanox MCP7Y10-N01A 800G OSFP to 2x 400G QSFP112 NDR Passive Copper Hybrid Breakout DAC, 1.5 meters: This is a 1.5 meters passive copper Direct Attach Cable (DAC) that splits a single 800G OSFP InfiniBand NDR switch port into two independent 400G QSFP112 NDR400 downlinks. This is a fixed-length passive twinax assembly with no DSPs, retimers, or optics. This is a downlink fanout cable, not an aggregation or end-to-end interconnect. This is a new unit.
Engineering Context
The MCP7Y10-N01A bridges OSFP-only 800G NDR switches with QSFP112-only 400G endpoints. OSFP 800G carries 8 lanes of 100G PAM4; each QSFP112 leg receives 4 lanes for 400Gb/s NDR400 operation. Passive copper introduces no DSP latency and consumes zero port power, making it preferred for AI synchronization workloads, HPC collective operations, and scale-out training where deterministic latency matters. Conductor is 28 AWG with an LSZH (Low Smoke Zero Halogen) jacket. At 1.5 meters, the cable operates with comfortable signal margin for 100G PAM4 per lane.
Deployment & Use Cases
Quantum-2 NDR switch downlinks to ConnectX-7 400G adapters in AI training clusters and GPU pods. Phased 800G rollouts where switch fabric runs OSFP 800G but compute nodes use QSFP112 400G NICs. Row-level fanout where 1m DACs are insufficient and 1.5m bridges adjacent racks. HPC systems prioritizing deterministic latency for collective operations such as AllReduce and AllGather.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCP7Y10-N01A
NVIDIA P/N: 980-9I80A-00N01A
Cable Type: Passive Copper Hybrid Breakout DAC (Twinax)
Topology: OSFP (800G NDR) to 2x QSFP112 (400G NDR400)
Protocol: InfiniBand NDR / NDR400
Signaling: PAM4, 100Gb/s per lane
Length: 1.5 meters
Conductor: 28 AWG
Jacket: LSZH (Low Smoke Zero Halogen)
Condition: New — Factory-sealed when available, full pre-shipment electrical validation by T.E.S IT-SOLUTIONS
Compatibility & Constraints
Compatible with NVIDIA Quantum-2 NDR switches (OSFP) configured for split / breakout mode, and with QSFP112 endpoints such as ConnectX-7 400G adapters. Not compatible with QSFP56 HDR 200G adapters or QSFP28 EDR / 100G adapters (different connector and lane structure). Not compatible with QSFP-DD ports. Switch port must be configured for 2x400G breakout in the InfiniBand subnet manager. Fixed 1.5m length, no field re-termination.
Why T.E.S IT-SOLUTIONS
Every cable is electrically validated for PAM4 lane integrity, fanout mapping, and connector condition before shipment. T.E.S IT-SOLUTIONS ships worldwide with secure packaging and offers expert consultation on InfiniBand NDR fabric topology and breakout configuration. Standard handling time is 1-3 business days.