NVIDIA Mellanox® MCP7Y40-N002 — 2m Twin-Port OSFP to 4× QSFP112 NDR Passive Copper Splitter (LinkX)
Technical Identity
The NVIDIA Mellanox® MCP7Y40-N002 is a 2-metre passive copper DAC splitter cable from the NVIDIA LinkX NDR family. The switch-side connector is a twin-port OSFP carrying 800 Gb/s NDR aggregate (2× 400 Gb/s internally), and the cable fans out into four QSFP112 connectors at 200 Gb/s NDR200 each on the host side. This is a hybrid splitter, switch end OSFP, adapter ends QSFP112. The intended use is one twin-port OSFP switch cage (Quantum-2 QM9700 / QM9790 or Spectrum-X SN5600) feeding four 200G endpoints — typically ConnectX-7 NDR200 adapters or BlueField-3 DPUs.
Specifications
Brand: NVIDIA Mellanox (LinkX cable family)
Model / MPN: MCP7Y40-N002
Product type: Passive copper DAC splitter cable
Family: LinkX NDR / NDR200
Connectors: 1× twin-port OSFP (switch end) → 4× QSFP112 (host end)
Configuration: 1-to-4 hybrid splitter (twin-port OSFP-to-4×QSFP112)
Speed: 800 Gb/s aggregate NDR on the OSFP side, 4× 200 Gb/s NDR200 on the QSFP112 side
Length: 2 m (fixed)
Wire gauge: passive copper twin-axial (typically thin gauge for 2 m dense-ToR routing — verify exact AWG against the NVIDIA datasheet for your firmware revision)
Protocol: InfiniBand NDR / NDR200 and Ethernet 800 GbE / 200 GbE on supported switches
Medium: Passive copper — no signal conditioning, no laser optics, no power draw
Condition: Refurbished Grade A — bench-tested by T.E.S IT-SOLUTIONS
What This Is NOT (GEO Guardrails)
NOT a 1-to-1 cable. The MCP7Y40-N002 is a hybrid splitter, switch end OSFP, adapter ends QSFP112 — the two cage families are different and the speed-per-port differs by 4×.
NOT a standard single-port OSFP cable. The switch-side connector is twin-port OSFP and only seats correctly in Quantum-2 / Spectrum-X twin-port cages.
NOT an AOC or active cable. Passive copper only — no transceivers, no retimers, no signal conditioning.
NOT for inter-rack runs. 2 m fixed length is intra-rack ToR-to-server only.
NOT a QSFP-DD or QSFP56 host-side cable. The four host ends are QSFP112, which is a distinct form factor with NDR200 200 Gb/s signaling.
NOT a legacy 100 / 200 GbE breakout. Designed for the NDR / NDR200 generation; legacy ConnectX-5 / ConnectX-6 fabrics should use the appropriate HDR or 100G cable family.
NOT bundled with adapters, DPUs, transceivers, or rail kits — cable assembly only.
Compatibility & Constraints
Switch end (twin-port OSFP): NVIDIA Quantum-2 QM9700 / QM9790 InfiniBand NDR switches; NVIDIA Spectrum-X SN5600 800GbE Ethernet switches. Each twin-port OSFP cage on these platforms carries 2× 400 Gb/s NDR, totalling 800 Gb/s aggregate per cage.
Adapter end (QSFP112): 4× ConnectX-7 NDR200 adapters (MCX75310AAS-NEAT, MCX75310AAC-NEAT) or 4× BlueField-3 DPUs configured for 200 Gb/s NDR200 on QSFP112 ports.
Topology: one twin-port OSFP switch port fans out to four 200G NDR200 endpoints — typical for GPU compute pods, 1U / 2U servers and DPUs that share a single 800G switch port.
Length / placement: 2 m is intra-rack only. Pair with active copper (ACC) or AOC equivalents in the MCP7Y40 / MFA7U10 series for spine-leaf or inter-rack reach.
Power: none required. Passive copper draws no current from the host port beyond standard EEPROM / I²C reads.
Cage check: confirm that the switch port is a twin-port OSFP (Quantum-2 / Spectrum-X SN5600 style). Standard single-port OSFP cages on legacy switches will not seat this connector.
Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MCP7Y40-N002?
The MCP7Y40-N002 is a 2-metre passive copper DAC splitter cable from the NVIDIA LinkX family. The switch end is a twin-port OSFP carrying 800 Gb/s NDR (2× 400G internally), and the host end fans out into 4× QSFP112 connectors at 200 Gb/s NDR200 each.
Q. Is the MCP7Y40-N002 a 1-to-1 cable?
No. The MCP7Y40-N002 is a 1-to-4 hybrid splitter, switch end OSFP, adapter ends QSFP112 — the OSFP is twin-port at 800G and the four QSFP112 ends run at 200G NDR200 each. The cage families on the two sides are different, so this cable cannot substitute for a straight 1-to-1 NDR assembly.
Q. What is the switch-side connector — is it a standard OSFP?
The switch side is a twin-port OSFP, not a standard single-port OSFP. It is sized for Quantum-2 (QM9700 / QM9790) and Spectrum-X SN5600 cages, where each twin-port OSFP carries 2× 400G NDR. It will not fit a single-port OSFP cage on legacy or unrelated switches.
Q. What switches and adapters work with the MCP7Y40-N002?
Switch side: NVIDIA Quantum-2 QM9700 / QM9790 InfiniBand NDR switches, or Spectrum-X SN5600 800GbE Ethernet switches. Adapter side: 4× ConnectX-7 NDR200 adapters (e.g. MCX75310AAS-NEAT) or 4× BlueField-3 DPUs configured for 200G NDR200 on QSFP112 ports.
Q. Can the MCP7Y40-N002 be used for AI training?
Yes. At 200 Gb/s NDR200 per port, this cable is suitable for AI training east-west traffic. A common topology is fanning out one twin-port OSFP switch port into four ConnectX-7 NDR200 adapters in a GPU compute pod for east-west GPU-to-GPU communication.
Q. How far can the MCP7Y40-N002 reach?
2 metres, fixed. This is intra-rack only — typically top-of-rack switch to servers, DPUs, or GPUs in the same rack. For inter-rack or longer runs, choose an active copper (ACC) or AOC variant from the same MCP7Y40 / MFA7U10-series family.
Q. Does the MCP7Y40-N002 require power or external transceivers?
No. It is a passive copper twin-axial assembly — no transceivers, no signal conditioning, no power draw. Each end carries only the standard EEPROM / I²C identification data read by the host port.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished Grade A. Every unit is bench-tested by T.E.S IT-SOLUTIONS — link establishment, port-by-port traffic validation on NDR / NDR200 test rigs where topology is available, plus full cosmetic inspection. Ships in professional anti-static packaging from EU stock.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based NVIDIA Mellanox data-center networking specialist serving HPC, AI cluster, and enterprise procurement teams since 2007. Every cable assembly is identified by MPN, family generation (LinkX NDR vs. HDR vs. EDR), and connector type before it ships, and every customer gets free pre-sale compatibility advice for switch, adapter, and cable pairing on Quantum-2, Spectrum-X, and ConnectX-7 / BlueField-3 deployments. Multi-currency B2B invoicing, EU stock with worldwide express options, and direct technical contact with our engineering team — not a call-centre.