How much VRAM does HunyuanVideo 1.5 need?
HunyuanVideo 1.5 needs about 12.3 GB at 8-bit, or 8.9 GB as a 4-bit GGUF, at its default output size.
- Type
- Video model
- Parameters
- 8.3B
- Text encoder
- Qwen2.5-VL-7B-Instruct + ByT5-small glyph encoder
- Released
- Nov 2025
- License
- Tencent Hunyuan Community License
Memory at each precision
| Precision | Weights | Peak at 720p, 5 s |
|---|---|---|
| 16-bit BF16 | 15.5 GB | 19.7 GB |
| 8-bit FP8 · Q8_0 | 8.0 GB | 12.3 GB |
| 6-bit GGUF Q6_K | 6.4 GB | 10.6 GB |
| 5-bit GGUF Q5_K_M | 5.5 GB | 9.7 GB |
| 4-bit GGUF Q4_K_M · NVFP4 | 4.7 GB | 8.9 GB |
The Qwen2.5-VL-7B-Instruct + ByT5-small glyph encoder text encoder (6.8 GB at FP8) runs first and then waits in system RAM.
What runs it
| Machine | Best fit | Per clip |
|---|---|---|
| RTX 3060 12 GB | 6-bit | 4.7 h |
| RTX 4060 Ti 16 GB | 8-bit | 2.3 h |
| RTX 3090 | 16-bit | 88 min |
| RTX 4090 | 16-bit | 38 min |
| RTX 5090 | 16-bit | 30 min |
| RTX PRO 6000 Blackwell | 16-bit | 13 min |
| M4 Max 128 GB | 16-bit | 6.7 h |
| M5 Max 128 GB | 16-bit | 2.0 h |
| Ryzen AI Max+ 395 128 GB | 16-bit | 3.0 h |
| DGX Spark 128 GB | 16-bit | 1.7 h |
| M3 Ultra 256 GB | 16-bit | 3.8 h |
| M5 Ultra 512 GB | 16-bit | 71 min |
| H100 SXM | 16-bit | 6.6 min |
| DGX Station GB300 | 16-bit | 2.8 min |
720p, 5 s, 50 steps. Times are rough, plus or minus 30%.
Where to get it
Questions
How much VRAM does HunyuanVideo 1.5 need?
HunyuanVideo 1.5 needs about 12.3 GB at 8-bit, or 8.9 GB as a 4-bit GGUF, at its default output size.
Can HunyuanVideo 1.5 run on an RTX 4090?
Yes. At 16-bit it takes about 38 min per clip.
More models
Data checked Oct 2026.