RX 6800 XT Crashing with ComfyUI? Fix It with Single-Rail PSU and Dual PCIe Cables
brapzky · reddit · 2026-08-14
The author details troubleshooting repeated hard system crashes while running Flux models on an RX 6800 XT using ComfyUI-ROCm. After extensive testing, the root cause was identified as the power supply configuration: switching the Corsair RM750i to Single-Rail mode and using two separate PCIe cables for the GPU's dual 8-pin connectors completely resolved the crashes, allowing for continuous, error-free generations.
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