Identity & Definition
The NVIDIA Mellanox MCP7Y00-N001 is a 1-meter passive copper splitter cable in the enterprise InfiniBand DAC cable category. This cable converts a single 800 Gb/s Twin-Port NDR OSFP port into two independent 400 Gb/s NDR OSFP outputs. All three connectors are OSFP with Flat-Top design. NVIDIA P/N: 980-9I432-00N001. This is an InfiniBand NDR cable — it does NOT support Ethernet. Condition: Refurbished.
Engineering Context
The 800 Gb/s OSFP upstream port contains eight 100G PAM4 lanes (8x 100 Gb/s = 800 Gb/s). The cable splits these into two groups of four lanes each, creating two independent 400 Gb/s NDR OSFP outputs (4x 100G PAM4 per output). As a fully passive copper splitter, it draws zero power, adds virtually no latency, and has no active electronics. The LSZH (Low Smoke Zero Halogen) jacket meets modern data center safety standards. The cable is physically stiff due to high-bandwidth NDR signal requirements and low-AWG copper conductors — it behaves as a rigid Y-harness and should be installed in straight paths without tight bends.
Deployment & Use Cases
Splitting NDR Twin-Port switch ports into two independent 400 Gb/s connections for OSFP-based ConnectX-7 NICs or DPUs operating in split-port mode. Intra-rack fan-out in AI training clusters using NVIDIA Quantum-2 NDR switches with OSFP ports. Liquid-cooled GPU cluster interconnects where OSFP Flat-Top connectors are required for thermal compatibility. High-density HPC fabrics maximizing port utilization by breaking 800G switch ports into 400G node connections.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: MCP7Y00-N001
NVIDIA P/N: 980-9I432-00N001
Type: Passive Copper Splitter (1-to-2 breakout)
Upstream: 1x OSFP 800 Gb/s NDR Twin-Port
Downstream: 2x OSFP 400 Gb/s NDR
Lane Assignment: 4x 100G PAM4 lanes per 400G output
Length: 1 meter
Connector Design: Flat-Top OSFP (all ends)
Jacket: LSZH
Power Draw: 0W (fully passive)
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
InfiniBand NDR only — does NOT support Ethernet, HDR (200 Gb/s), or EDR (100 Gb/s). All three connectors are OSFP — NOT compatible with QSFP112, QSFP56, QSFP-DD, or QSFP28 ports. Flat-Top OSFP design — intended for liquid-cooled or thermally managed chassis; NOT recommended for air-cooled OSFP cages requiring RHS (finned-top) heat dissipation without explicit vendor support. Passive design limits reach to 1 meter. The cable is physically rigid and should not be bent or routed through cable management arms. For the 1-to-4 breakout (800G to 4x 200G NDR200), see MCP7Y50-N001 instead.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS (tes-itsolutions.com) signal-tests every NDR splitter cable on NVIDIA NDR/NDR200 hardware for full link validation. Technical consultation available for NDR fabric design and OSFP cable planning. Global shipping with 1–3 business day handling.