MCP7H60-W001R30, MCP7H60-W002R26 and MCP7H60-W003R26 are the same cable in three lengths — 1 m, 2 m and 3 m. Each is NVIDIA's 400GbE QSFP-DD to 2×200GbE QSFP56 passive copper breakout: one QSFP-DD end for a 400G switch port, two QSFP56 legs for two 200G hosts such as DGX Sparks or ConnectX-7 adapters. The suffix after the length only tells you the wire gauge. Pick by distance, and make sure your switch cage is QSFP-DD, not OSFP — that is the mistake that actually costs people a return.
Short answer: same cable, different length
Most desk and short-rack builds want the 2 m MCP7H60-W002 — $179.45 at Resilient Tec
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MCP7H60-W002 — 400G QSFP-DD to 2×200G QSFP56 breakout DAC, 2 m MCP7H60-W002R26 compatible. 26 AWG. |
$179.45 · In stock at Resilient Tec Add to cart |
New, lifetime warranty, free standard shipping on all US orders, shipping from Knoxville, Tennessee. Need 1 m or 3 m? Ask us. Price checked September 28, 2026. POs and net terms available.
Decoding the Part Number
NVIDIA's DAC part numbers pack the whole spec into one string. For the MCP7H60 family:
- MCP7H60 — the cable family: passive copper splitter, QSFP-DD to 2×QSFP56
- W — the speed class: 400GbE Ethernet
- 001 / 002 / 003 — length in meters. An A in this field (W01A, W02A) marks the half-meter lengths, 1.5 m and 2.5 m
- R30 / R26 — the wire gauge: 30 AWG or 26 AWG
| NVIDIA part number | Length | Wire gauge | Cable diameter | Best for |
|---|---|---|---|---|
| MCP7H60-W001R30 | 1 m | 30 AWG | 6.9 mm | Switch and nodes on the same shelf; tight bends |
| MCP7H60-W002R26 | 2 m | 26 AWG | 9.0 mm | Desk or half-rack builds; the usual choice |
| MCP7H60-W003R26 | 3 m | 26 AWG | 9.0 mm | Switch in an adjacent rack or across a bench |
The thinner 30 AWG wire is why the 1 m cable is easier to route; the 26 AWG wire at 2 and 3 m keeps signal loss in budget over the longer run. All three draw a maximum of 0.1 W — they are passive, so there are no optics to cool or fail. Buy the shortest length that reaches without strain; extra DAC length is stiff and hard to dress.
Other Names for the Same Cable
Compatible sellers use their own SKUs, which is where most of the confusion comes from. NADDOD lists the 2 m as Q2Q56-400G-CU2; FS.com and others list it as a "400G QSFP-DD to 2×200G QSFP56 passive breakout DAC" with the NVIDIA part number as a compatibility reference. Resilient Tec lists it under the NVIDIA number, MCP7H60-W002. If the listing says QSFP-DD on one end, 2×QSFP56 at 200G on the other, and passive copper, it is the same cable.
The Look-Alikes That Won't Fit
These are real, useful cables — we stock most of them — but they are the wrong answer if you need a 400G QSFP-DD to 2×200G split.
| Part number | What it is | Why it's different |
|---|---|---|
| MCP7H50-H001R30 | 200G QSFP56 to 2×100G QSFP56 | Half the speed, QSFP56 head. For a 200G switch port feeding 100G hosts. |
| MFA7U10-H003 | 400G OSFP to 2×200G QSFP56 active optical | Same split, but an OSFP head. Fits OSFP switch cages, not QSFP-DD. |
| MCP7Y00-N002 | 800G OSFP to 2×400G OSFP | NDR-class switch cabling. OSFP on both ends. |
| MCP7Y50-N001 | 800G OSFP to 4×200G OSFP | Four-way split with OSFP legs, which won't fit a QSFP56 host. |
The quick test: look at the switch cage. A QSFP-DD cage is the same width as a QSFP cage with a second row of contacts; an OSFP cage is wider and deeper. If your switch is QSFP-DD (MikroTik CRS804 and CRS812, and most 400G Ethernet switches in this class), the MCP7H60 is your cable.
Where the QSFP56 Legs Can Go
Each leg is a standard 200G QSFP56 connector. It links at 200G in any QSFP56 or QSFP112 host cage, which covers the DGX Spark and other GB10 systems, ConnectX-7 adapters, and 200G ConnectX-6 adapters. The split always happens at the switch end; never try to split the host side. On a DGX Spark in particular, the QSFP port will not break out into separate links — see Can You Build a 4-Node DGX Spark Cluster Without a Switch?
FAQ
What is the difference between MCP7H60-W001R30, W002R26 and W003R26?
Length and wire gauge only. W001R30 is 1 m with 30 AWG wire, W002R26 is 2 m with 26 AWG, and W003R26 is 3 m with 26 AWG. All three are 400GbE QSFP-DD to 2×200GbE QSFP56 passive copper breakouts.
Is MCP7H60-W002 the same as MCP7H60-W002R26?
Yes. The R26 suffix is the wire gauge. Resilient Tec's MCP7H60-W002 is an MCP7H60-W002R26-compatible 2 m cable, $179.45 new with a lifetime warranty (price checked September 28, 2026): https://resilient-tec.com/products/nvidia-mellanox-compatible-mcp7h60-w002-400g-qsfp-dd-to-2x200g-qsfp56-passive-breakout-dac-cable-2m
Will a 400G QSFP-DD breakout work in an OSFP switch?
No. The head connector has to match the switch cage. For an OSFP switch port feeding two 200G QSFP56 hosts, you need an OSFP-headed cable such as the MFA7U10-H003 active optical breakout.
Can I use the MCP7H60 to connect DGX Sparks?
Yes, through a switch. The QSFP-DD end goes in a 400G switch port and each QSFP56 leg goes in one Spark. Two cables connect four Sparks on two switch ports.
Which length should I buy?
The shortest that reaches without strain. 2 m suits most desk and half-rack builds; 1 m suits a switch on the same shelf; 3 m reaches an adjacent rack.
Ready to Buy?
New, lifetime warranty backed by Resilient Tec, free standard shipping on all US orders, shipping from Knoxville, Tennessee. Price checked September 28, 2026.
Need a different length or a mix of cables? Send us your switch and host models.
You Might Also Need
- MikroTik CRS804 + DGX Spark — port math and RouterOS settings for a four-node cluster
- DGX Spark stuck at 100 Gb/s on a breakout? — getting to 200G
- OSFP vs QSFP-DD — telling the cages apart
- DAC vs AOC vs AEC — when copper stops reaching
Sources
- NVIDIA MCP7H60-W0xxRyy 400GbE to 2×200GbE DAC splitter cable — specifications
- NADDOD Q2Q56-400G-CU2 listing
- MikroTik CRS804-4DDQ product page