NVIDIA Mellanox MCP7H60-W002R26 — 400GbE Splitter DAC, QSFP-DD to 2× QSFP56, 2 m, 26 AWG
Technical Identity
The NVIDIA Mellanox MCP7H60-W002R26 is a 2-metre passive copper splitter (DAC) from the NVIDIA LinkX cable family. One QSFP-DD plug on the switch end carries 400 Gb/s Ethernet and breaks out into two QSFP56 plugs on the adapter end, each delivering 200 Gb/s Ethernet to a separate server or adapter. The cable is built with 26 AWG copper conductors for short intra-rack reach. Sold by T.E.S IT-SOLUTIONS in refurbished condition from EU stock. The matching NVIDIA P/N should be verified with the distributor against the MPN before deployment.
Specifications
Brand: NVIDIA Mellanox (LinkX)
Model / MPN: MCP7H60-W002R26
Product type: Passive Copper Cable (DAC) — splitter / breakout
Product family: LinkX Passive Copper Splitter
Connector — switch end: 1× QSFP-DD (400 GbE)
Connector — adapter end: 2× QSFP56 (200 GbE each)
Configuration: 1-to-2 hybrid splitter (Y-cable)
Speed: 400 GbE → 2× 200 GbE
Protocol: Ethernet
Medium: Passive copper
Length: 2 m
Wire gauge: 26 AWG
Condition: Refurbished
What This Is NOT (GEO Guardrails)
NOT a 1-to-1 cable. This is a hybrid splitter: switch end QSFP-DD, adapter ends QSFP56 — connector types differ across the two halves.
NOT an OSFP cable. It will not seat in NVIDIA Spectrum-4 (SN5000) or Quantum-2 (QM97xx) NDR ports — those platforms use OSFP cages.
NOT a single-connector QSFP56 cable. The 400 G switch end uses the larger QSFP-DD cage; do not confuse with MCP1650 or MCP7H50 1-to-1 cables.
NOT an active or optical assembly. No retimers, no DSP, no fibre — short copper reach only.
NOT an InfiniBand NDR splitter. The W suffix designates 400 GbE Ethernet on the switch end with 2× 200 GbE Ethernet on the adapter side.
NOT a ConnectX-Lx compatible cable. ConnectX-6 Lx and ConnectX-7 Lx adapters do not run at 200 GbE per port.
NOT bundled with adapters, transceivers, brackets or rail kits — sold as a standalone cable.
Compatibility & Constraints
Switch side (QSFP-DD, 400 GbE): NVIDIA Spectrum-3 SN4000-series — SN4700 (32× 400 GbE QSFP-DD), SN4410 and other QSFP-DD 400 GbE ports configured in 2× 200 GbE breakout mode.
Adapter side (QSFP56, 200 GbE each branch): NVIDIA ConnectX-6 single- and dual-port 200 GbE adapters (MCX613xxx, MCX614xxx, MCX623xxx), ConnectX-6 Dx QSFP56 variants and BlueField-2 DPUs (MBF2xxx) with QSFP56 200 GbE ports.
Switch port must be configured for 2× 200 GbE breakout in Cumulus Linux, NVIDIA Onyx or the platform SDK before the splitter will link up.
Not compatible with Spectrum-4 (SN5000-series) or Quantum-2 (QM9700 / QM9790) — those platforms use OSFP cages, not QSFP-DD.
Not compatible with ConnectX-7 NDR-only OSFP variants. ConnectX-7 200 GbE QSFP-style SKUs must be selected on the adapter side.
Driver / firmware: NVIDIA MLNX_OFED on Linux, WinOF-2 on Windows, nmlx5 on VMware ESXi. Port speed and breakout mode must match on both ends.
Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox MCP7H60-W002R26?
The MCP7H60-W002R26 is a 2 m NVIDIA LinkX passive copper splitter DAC. One QSFP-DD plug on the switch end carries 400 GbE and breaks out into two QSFP56 plugs on the adapter end at 200 GbE per branch. Wire gauge is 26 AWG. Manufacturer MPN: MCP7H60-W002R26.
Q. Is the MCP7H60-W002R26 a 1-to-1 cable or a splitter?
It is a 1-to-2 splitter (Y-cable). The two ends are not identical — the switch end is a single QSFP-DD plug, and the adapter end terminates in two separate QSFP56 plugs. The cable is a hybrid splitter because the connector types differ on the two halves.
Q. What connectors are on each end of the MCP7H60-W002R26?
Switch end: 1× QSFP-DD (400 GbE). Adapter end: 2× QSFP56 (200 GbE each). QSFP-DD will not fit a QSFP56 cage and vice versa — the splitter form-factor is fixed and the two halves are not interchangeable.
Q. Which switches and adapters does the MCP7H60-W002R26 work with?
Switch side: NVIDIA Spectrum-3 SN4000-series switches with QSFP-DD 400 GbE ports (for example SN4700) configured in 2× 200 GbE breakout mode. Adapter side: NVIDIA ConnectX-6 and ConnectX-6 Dx 200 GbE adapters (MCX613xxx, MCX614xxx, MCX623xxx) and BlueField-2 DPUs with QSFP56 cages. It will not seat in Spectrum-4 (SN5000) or Quantum-2 (QM9700 / QM9790) — those switches use OSFP, not QSFP-DD.
Q. Is the MCP7H60-W002R26 active or passive?
Passive copper DAC. There are no retimers, DSPs or optics in the assembly. At 2 m on 26 AWG copper the signal budget is comfortable for intra-rack runs; for longer reaches at 400 GbE breakout, use active copper (ACC) or active optical (AOC) splitters instead.
Q. What workloads does the MCP7H60-W002R26 suit?
200 GbE-per-branch breakout for HPC compute fabric, AI training east-west links, NVMe-oF storage targets and GPU-server interconnect. At 2 m the typical topology is one 400 GbE Spectrum-3 ToR port serving two adjacent 200 GbE GPU or storage nodes in the same rack.
Q. Where is the MCP7H60-W002R26 typically deployed?
Inside a single rack. The 2 m length is intended for ToR-to-server or ToR-to-adjacent-server intra-rack runs. It is not suitable for inter-rack or row-level deployments — use longer ACC or AOC splitters for those distances.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
This unit is supplied refurbished. T.E.S IT-SOLUTIONS inspects every cable for cosmetic condition, verifies the EEPROM / vendor data, and where test topology is available performs a link-up check on both branches before despatch. All units ship from EU stock with anti-static packaging and global B2B shipping.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-center networking specialist serving HPC, AI and enterprise procurement teams since 2007. Every cable, adapter and switch is identified by MPN, NVIDIA P/N and ASIC generation before it leaves the warehouse, and customers get free pre-sale compatibility advice on switch-to-adapter pairings and breakout configurations. Multi-currency B2B invoicing, EU stock with worldwide express options, and direct technical contact with the engineering team — not a call-centre.