Fixing Black Video Outputs with MiniMax H3 on AMD GPUs
Present-Guitar-3967 · reddit · 2026-08-09
A developer encountered black screen outputs (with only audio) when running the MiniMax H3 model via ComfyUI on an AMD RX 7900 XTX GPU. Troubleshooting revealed that the VAE decoder weights were being corrupted by NaN values during partial offloading back to VRAM.
The issue was resolved by adding the --disable-smart-memory --cache-none flags, which forces ComfyUI to completely offload the VAE to RAM, preventing corruption.
Related event: MiniMax H3 Black Screen Issue on AMD GPUs(2 posts)→
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