NVIDIA DGX Spark DAC cable, QSFP - QSFP, 0.5m
NVIDIA DGX Spark DAC cable, QSFP - QSFP, 0.5m
PNY DAC QSFP 112G stacking cable for NVIDIA DGX Spark, 0.5m
This passive DAC cable is designed for stacking two or three NVIDIA DGX Spark systems via their native 400G QSFP port (ConnectX-7). Built to the QSFP112 standard, the cable combines four channels with a transfer rate of up to 100Gb/s each (PAM4-112G) to deliver an aggregate throughput of 400Gb/s; however, DGX Spark firmware limits the operating speed to 200Gb/s, meaning slower QSFP56 (200G) cables are not compatible – the ConnectX-7 firmware rejects them as non-compliant. Amphenol Spectra-Strip SKEWCLEAR EXD technology featuring 32 AWG conductors ensures a smooth high-frequency response above 20GHz, lower crosstalk, and greater flexibility compared to standard 30 AWG alternatives.
Key features of the PNY NVIDIA DGX Spark DAC cable, QSFP - QSFP, 0.5m
- Certified compatibility with NVIDIA DGX Spark and ConnectX-7
- Designed specifically for connecting two DGX Spark units via their native ConnectX-7 QSFP ports
- Transfer speed of up to 200Gb/s with 112G PAM4 signalling
- Passive direct attach copper (DAC) design with PAM4 modulation ensures stable, low-latency data transfer for demanding AI workloads and distributed computing
- Passive design with no active components
- Absence of active electronics reduces power consumption to a minimum and eliminates the need for extra cooling
- 32 AWG copper conductors for signal integrity
- High-quality copper conductors with low attenuation and minimal crosstalk ensure reliable signal transmission
- QSFP form factor on both ends
- 0.5m length
- QSFP connectors ensure easy integration without the need for special tools
Uncompromised connectivity for two NVIDIA DGX Spark systems
When stacking two DGX Spark units, cable choice matters more than you might think. The ConnectX-7 port firmware actively verifies the compatibility of any connected cable and rejects unsuitable alternatives – resulting in a failed connection regardless of the theoretical specifications of any substitute. The PNY DGXSPARK-BUNDL-CABLE meets this requirement perfectly, allowing two DGX Spark units to form a virtual cluster with a transfer speed of up to 200Gb/s for shared AI training workloads and distributed computing. Its passive DAC design with 32 AWG copper conductors and 112G PAM4 signalling does not add any active electronics, requires no cooling, and keeps power consumption to an absolute minimum – a practical benefit in environments where every watt and every centimetre of space counts. The 0.5m length covers the standard distance between units on a desk or in a rack, ensuring neat cabling without unnecessary loops.
Specifications
Use
Male connectors
Type and number of connectors
Cable construction
Features
Operating system
Package contents
Processor
GPU series/model
Memory
PNY Technologies Europe, ZAC du Phare 9 rue Joseph Cugnot 33708 Mérignac cedex, France https://www.pny.com/en-eu/support-footer/technical-support
Specifications can be changed without notice. Images are for illustrative purposes only.
