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Wan 2.2 I2V on a 12GB card only used 8–9GB of VRAM. System RAM was the real bottleneck (measured, 3 renders)

I wanted to know whether Wan 2.2 image-to-video is realistic on smaller cards, so I watched where the memory actually goes during real renders. Setup: RTX 5070 12GB (PCIe 5.0 x16), 64GB DDR5-6000, ComfyUI 0.37 with dynamic VRAM loading. Wan 2.2 I2V A14B fp8 (high + low noise), lightx2v LoRA, 12+12…

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  1. 2026-10-19 11:31 · r/comfyui
    Wan 2.2 I2V on a 12GB card only used 8–9GB of VRAM. System RAM was the real bottleneck (measured, 3 renders)

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