RTX 5090 PSU clicking noise only in ComfyUI Moss Image workflow — 900mV undervolt fixes it
Garito10 · reddit · 2026-10-24
A Reddit user reports clicking/crackling noise from a be quiet! Dark Power 13 1000W PSU when an RTX 5090 runs ComfyUI's default Moss Image workflow — silent during FurMark at 575W, Krea 2, and Qwen Image, stopping the instant generation ends.
Diagnosis: cables and voltages are fine (16-pin stays above 12.3V), noise confirmed inside the PSU. The likely cause is coil whine from rapid transient voltage spikes between CUDA kernels at a specific frequency. Workarounds: lowering the power limit to 85%, or flattening the voltage/frequency curve in MSI Afterburner at 900mV/2700MHz, eliminates it completely. The author is asking whether it's harmless coil noise or grounds for RMA.
More from Infra
- Cognitive Revolution: GPU credit crunch, 2027 RSI timelines, supply chain value — The Cognitive Revolution · 2026-10-24
- billion-context plugin compresses billion-token agent sessions into a 100K window — aigclink · 2026-10-24
- zml/llmd claims faster-than-oMLX Metal inference, adds NVFP4 support — jedisct1 · 2026-10-24
- Claude API Adds Workload Identity Federation to Kill Static API Keys — brada · 2026-10-24
- LLM inference may be shifting from batch to sequence parallelism, setting up diffusion LMs — sedielem · 2026-10-24
- PNG is slow because of deflate, not libpng — zlib-ng's SIMD wins — ssh4net · 2026-10-24