2.83 - Cycles - CUDA error: Out of memory in mem_alloc_result, line 815 When rendering in Cycles at 1080p, everything went fine until it started denoising. I then suddenly got the error: CUDA error: Out of memory in mem_alloc_result, line 815.
My GPU has 6GB VRAM and my computer has 24GB RAM, yet neither showed any signs of approaching the max.
Denoising the entire 1920x1080 image at once caused the out-of-memory issue. Disabling Progressive Refine and making the tile size reduced the number of pixels denoised at once, eliminating the issue.