This third-party passive breakout DAC cable is compatible with NVIDIA/Mellanox MCP7H60-W001R30: one 400G QSFP-DD switch port fans out to two 200G QSFP56 ports. The 1 m length uses thinner 30 AWG wire, so it routes easily when the switch sits on the same shelf as the nodes.
Supports full 400Gbps (split to 2x200Gbps, 8x50G PAM4 lanes) with ultra-low latency and power. Backed by our lifetime warranty. New, with free standard shipping on all US orders.
Key Features
-
Short, flexible run: 1 m, 30 AWG — the easiest length to dress in a tight desk or half-rack build.
-
Plug-and-Play: Hot-pluggable connectors with pre-programmed EEPROM for NVIDIA/Mellanox compatibility.
-
Passive and cool: No optics to power, cool or fail.
-
Lifetime Warranty backed by Resilient Tec.
Technical Specifications
-
Data Rate: 400Gbps (400GbE, split to 2x200Gbps, 8x50Gbps PAM4)
-
Connectors: 1x QSFP-DD to 2x QSFP56
-
Lane Mapping: TX1-4 / RX1-4 to leg 1, TX5-8 / RX5-8 to leg 2 — each leg runs 200G CR4 (4 lanes)
-
Length: 1 meter (3.3 ft)
-
Cable Type: Passive Twinax Copper, 30 AWG
-
Operating Temperature: 0°C to 70°C
-
Standards Compliance: IEEE 802.3cd, SFF-8665, QSFP-DD/QSFP56 MSA, CMIS compliant
-
Cross-reference: NVIDIA MCP7H60-W001R30 (30 AWG, 1 m); family documented as MCP7H60-W0xxRyy. Also sold as the 1.5 m MCP7H60-W01AR30, 2 m MCP7H60-W002 and 3 m MCP7H60-W003.
Compatibility
- NVIDIA ConnectX-7 / ConnectX-6 adapters (200G ports)
- NVIDIA DGX Spark and other GB10 systems (ASUS Ascent GX10, Dell Pro Max GB10, HP ZGX Nano AI Station) — switch-side breakout, one port to two nodes
- MikroTik CRS804-4DDQ and CRS812-8DS-2DQ-2DDQ 400G QSFP-DD switches
- Other QSFP-DD/QSFP56 platforms
NVIDIA DGX Spark and GB10 Clustering
One 400G QSFP-DD switch port fans out into two 200G QSFP56 legs, and each leg feeds one Spark at a full, unsplit 200G. The Spark's QSFP112 cage accepts a QSFP56 plug.
Compatible with MikroTik CRS804-4DDQ and CRS812 QSFP56-DD ports (set speed=200G-baseCR4 on lanes 1 and 5). Four DGX Sparks = 2 cables.
Breakout belongs on the switch end only. NVIDIA does not enable or validate port splitting on the DGX Spark's ConnectX-7. Use this cable to fan a switch port out to two Sparks — never the other way round.
Not sure which length or how many? See the DGX Spark interconnect reference or send us your node count and switch model.
