HunyuanVideo (13B, original) on 20 GB of VRAM
Yes, but only just: Q8_0 leaves 1.7 GB free on 20 GB. The original 13B HunyuanVideo from December 2024. Largely replaced by the lighter HunyuanVideo 1.5, but still widely used with its LoRAs.
Runs well
Yes, just.
Q8_0 (14.0 GB) fits with only 1.7 GB to spare (about 18.3 GB of 20 GB).
Best fileQ8_0
File size14.0 GB
VRAM needed~18.3 GB
System RAM32 GB+
Memory map · 20 GB GPU18.3 GB / 20 GB
010 GB20 GB
Weights Q8_0 · 14.0 GBWorking memory · 3.5 GBReserve · 0.8 GBFree · 1.7 GB
calculated How this is counted.
Got an RTX 40 or 50? Swap Q8_0 for FP8 (13.2 GB): same quality class, computed natively there.
01What to download
| Part | File | Folder | Size | |
|---|---|---|---|---|
| Model | hunyuan-video-t2v-720p-Q8_0.gguf Q8_0 · city96/HunyuanVideo-gguf | models/unet | 14.0 GB | Download → |
| Text encoder | llava_llama3_fp8_scaled.safetensors LLaVA-Llama3 FP8 (scaled) · Comfy-Org/HunyuanVideo_repackaged | models/text_encoders | 9.1 GB | Download → |
| Text encoder | clip_l.safetensors CLIP-L · Comfy-Org/HunyuanVideo_repackaged | models/text_encoders | 0.2 GB | Download → |
| VAE | hunyuan_video_vae_bf16.safetensors HunyuanVideo VAE BF16 · Comfy-Org/HunyuanVideo_repackaged | models/vae | 0.5 GB | Download → |
| Total download · keep about the same free on disk | 23.8 GB | |||
Alternatives: LLaVA-Llama3 FP16 (16.1 GB). Only for some workflows: LLaVA-Llama3 vision (0.6 GB, I2V only). Sizes from Hugging Face, 2026-10-01.
02Every file, on 20 GB
| File | Size | Needed | On this card | Quality | Download |
|---|---|---|---|---|---|
| 16-bit SAFETENSORS · Comfy-Org | 25.6 GB | 29.9 GB | 9.9 GB too big | the original weights | Hugging Face → |
| Q8_0 ← GGUF · city96 | 14.0 GB | 18.3 GB | fits · 1.7 GB spare | practically identical to the original | Hugging Face → |
| FP8 SAFETENSORS · Kijai | 13.2 GB | 17.5 GB | fits · 2.5 GB spare | practically identical to the original | Hugging Face → |
| Q6_K GGUF · city96 | 11.0 GB | 15.3 GB | fits · 4.7 GB spare | very close to the original | Hugging Face → |
| Q5_K_M GGUF · city96 | 9.4 GB | 13.7 GB | fits · 6.3 GB spare | close; small differences in fine detail | Hugging Face → |
| Q4_K_M GGUF · city96 | 7.9 GB | 12.2 GB | fits · 7.8 GB spare | good; some loss in fine detail and text | Hugging Face → |
| Q3_K_M GGUF · city96 | 6.2 GB | 10.5 GB | fits · 9.5 GB spare | noticeable loss of detail | Hugging Face → |
“Needed” adds 3.5 GB of working memory for HunyuanVideo 13B and a 0.8 GB reserve. Sizes 2026-10-01.