A Reddit user detailed three bugs affecting ComfyUI on Turing architecture GPUs, specifically the Quadro RTX 6000. The primary issue identified was an FP16 overflow in PyTorch's `torch.mm()` function when input values exceed approximately 44, leading to infinite values and black image outputs. This bug, present in PyTorch 2.12.0+cu126, can be mitigated by using `.bfloat16()` instead of `.half()`. Additionally, Turing GPUs may encounter a `cudaMallocAsync != native` crash at startup, which is resolved by setting the `PYTORCH_CUDA_ALLOC_CONF` environment variable. The user also noted that persistent issues could indicate a hardware defect in the GPU's VRAM. AI
IMPACT Addresses specific software bugs impacting AI image generation workflows on certain hardware.
RANK_REASON User-reported debugging of software issues for a specific tool and hardware.
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