Wan 2.1 VACE 14B on 12 GB of VRAM
Not entirely. Even Q3_K_S is 0.6 GB over 12 GB, so ComfyUI keeps part of it in system RAM. The all-in-one Wan for control and editing: reference-to-video, pose and depth control, inpainting and extending clips.
Offload
Not entirely in VRAM, but it can still run.
Nothing fits entirely, but Q3_K_S (7.8 GB) overflows by only about 0.6 GB. ComfyUI keeps that part in system RAM automatically: slower than a full fit, but usable.
Best fileQ3_K_S
File size7.8 GB
VRAM needed~12.6 GB
System RAM32 GB+
Memory map · 12 GB GPU12.6 GB needed · 0.6 GB over 12 GB
06 GB13 GB
Weights Q3_K_S · 7.8 GBWorking memory · 4.0 GBReserve · 0.8 GBSpills to system RAM · 0.6 GB
calculated How this is counted.
01Other amounts of VRAM
02Every file, on 12 GB
| File | Size | Needed | On this card | Quality | Download |
|---|---|---|---|---|---|
| 16-bit SAFETENSORS · Comfy-Org | 34.7 GB | 39.5 GB | 27.5 GB too big | the original weights | Hugging Face → |
| Q8_0 GGUF · QuantStack | 18.7 GB | 23.5 GB | 11.5 GB too big | practically identical to the original | Hugging Face → |
| Q6_K GGUF · QuantStack | 14.5 GB | 19.3 GB | 7.3 GB too big | very close to the original | Hugging Face → |
| Q5_K_M GGUF · QuantStack | 13.0 GB | 17.8 GB | 5.8 GB too big | close; small differences in fine detail | Hugging Face → |
| Q4_K_M GGUF · QuantStack | 11.6 GB | 16.4 GB | 4.4 GB too big | good; some loss in fine detail and text | Hugging Face → |
| Q3_K_S ← GGUF · QuantStack | 7.8 GB | 12.6 GB | spills 0.6 GB | noticeable loss of detail | Hugging Face → |
“Needed” adds 4 GB of working memory for Wan VACE 14B and a 0.8 GB reserve. Sizes 2026-10-01.
03What to download
| Part | File | Folder | Size | |
|---|---|---|---|---|
| Model | Wan2.1_14B_VACE-Q3_K_S.gguf Q3_K_S · QuantStack/Wan2.1_14B_VACE-GGUF | models/unet | 7.8 GB | Download → |
| Text encoder | umt5_xxl_fp8_e4m3fn_scaled.safetensors UMT5-XXL FP8 (scaled) · Comfy-Org/Wan_2.1_ComfyUI_repackaged | models/text_encoders | 6.7 GB | Download → |
| VAE | wan_2.1_vae.safetensors Wan 2.1 VAE · Comfy-Org/Wan_2.1_ComfyUI_repackaged | models/vae | 0.3 GB | Download → |
| Total download · keep about the same free on disk | 14.8 GB | |||
Alternatives: UMT5-XXL FP16 (11.4 GB). Sizes from Hugging Face, 2026-10-01.