MCP4Y00-N003: NVIDIA NDR 400Gb/s OSFP Direct Attach Copper Cable 3m
Also listed as: MCP4Y00-N003-OEM
The NVIDIA MCP4Y00-N003 is a 3-meter passive OSFP direct attach copper cable providing 400Gb/s NDR InfiniBand and 400GbE connectivity for AI compute clusters.
Specifications
| Part number | MCP4Y00-N003 |
|---|---|
| Brand | NVIDIA |
| Type | Cables |
| Other numbers | MCP4Y00-N003-OEM |
| Status | current |
| Form factor | OSFP to OSFP |
| Speed | 400Gb/s InfiniBand / 400GbE |
| Length m | 3 |
| Cable type | Passive Copper Twinax |
| Wire gauge | 26 AWG |
About the MCP4Y00-N003
The NVIDIA MCP4Y00-N003 LinkX passive direct attach copper cable delivers 400Gb/s NDR InfiniBand and 400GbE data transfer across a 3-meter span. Utilizing 4 channels of 100Gb/s PAM4 transmission across premium twinaxial conductors, it provides extreme data bandwidth with low latency. It is the primary connection medium for AI superclusters connecting DGX nodes to Quantum-2 switches.
Compatibility
Designed for NVIDIA Quantum-2 QM9700 and QM9790 InfiniBand switches, Spectrum-4 SN5600 switches, and ConnectX-7 OSFP host adapters. It supports rail-optimized AI clustering, large language model distributed training, and ultra-high-speed storage fabric connectivity.
How to identify a genuine unit
Equipped with heavy-duty finned OSFP connector heads designed to integrate with chassis cooling airflow paths. Each connector features a green pull-release tab and serialized label with part number MCP4Y00-N003. Embedded firmware EEPROMs identify cable capabilities and transmit characteristics to the host operating system.
Buying used
Inspect the finned connector tops for physical impact damage and ensure that the twinax cable jacket has not suffered mechanical compression. Insert the cable into test OSFP ports to verify positive latching and confirm that link training achieves full 400Gbps NDR performance without errors.
Fits these models
Check compatibility with NVIDIA
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that NVIDIA has tested with the NVIDIA MCP4Y00-N003.
- Compatibility NVIDIA Qualified System Catalog (certified GPU servers)
- Specifications NVIDIA Networking documentation (adapters, switches, cables)
- Support NVIDIA Enterprise Support
FAQ
What systems use this 400G OSFP cable?
NVIDIA Quantum-2 QM9700 switches, Spectrum-4 SN5600 switches, and DGX H100/H200 compute nodes.
Does the cable have flat top or finned top connectors?
It features integrated finned tops for passive cooling within switch chassis airflow paths.
Buying or selling MCP4Y00-N003?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- NVIDIA Quantum-2 Interconnect Specifications, checked 2026-10-27