Fixing Intel Arc VRAM Issues: Developer Releases Stability Patch for ComfyUI
Valuable-Subject-274 · reddit · 2026-08-11
A developer using an Intel Arc B580 GPU has released a custom patch for ComfyUI to address VRAM detection issues that caused freezes and crashes when running heavy models.
- Root Cause: ComfyUI's default estimation of available VRAM on Intel XPU was inaccurate, leading to poor memory management decisions, KSampler getting stuck at 0%, or outright crashes.
- The Fix: Drawing on NVIDIA's approach, the patch enables ComfyUI to read the actual current global free VRAM and factor in reusable PyTorch cache. This prevents VRAM overflow and significantly improves stability during model switching and generation. The author notes that the B580's stability now rivals an RTX 5060 Ti.
- Recommendations: The patch runs automatically in the background without adding new nodes. For users experiencing stability regressions in ComfyUI 0.31.1, the author also shared specific launch arguments optimized for XPU.
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