Can the RTX 5080 16 GB run HunyuanVideo 1.5?
Yes. FP8 fits on the RTX 5080 16 GB with 3.4 GB to spare.
Take FP8 (8.3 GB). In use it comes to about 12.6 GB, with 3.4 GB left over on 16 GB.
01What to download
| Part | File | Folder | Size | |
|---|---|---|---|---|
| Model | hunyuanvideo1.5_480p_t2v_cfg_distilled_fp8_scaled.safetensors FP8 · Comfy-Org/HunyuanVideo_1.5_repackaged | models/diffusion_models | 8.3 GB | Download → |
| Text encoder | qwen_2.5_vl_7b_fp8_scaled.safetensors Qwen2.5-VL 7B FP8 (scaled) · Comfy-Org/HunyuanVideo_1.5_repackaged | models/text_encoders | 9.4 GB | Download → |
| Text encoder | byt5_small_glyphxl_fp16.safetensors ByT5 small GlyphXL FP16 · Comfy-Org/HunyuanVideo_1.5_repackaged | models/text_encoders | 0.4 GB | Download → |
| VAE | hunyuanvideo15_vae_fp16.safetensors HunyuanVideo 1.5 VAE FP16 · Comfy-Org/HunyuanVideo_1.5_repackaged | models/vae | 2.5 GB | Download → |
| Total download · keep about the same free on disk | 20.7 GB | |||
Alternatives: Qwen2.5-VL 7B BF16 (16.6 GB). Only for some workflows: SigCLIP vision patch14 384 (0.9 GB, I2V only). Sizes from Hugging Face, 2026-10-01.
Free ComfyUI workflow, tested on my RTX 5060 Ti: 480p text to video, FP8 workflow (.json). Drag the file into ComfyUI. All workflows →
02Every HunyuanVideo 1.5 file on 16 GB
| File | Size | Needed | On this card | Quality | Download |
|---|---|---|---|---|---|
| 16-bit SAFETENSORS · Comfy-Org | 16.7 GB | 21.0 GB | 5.0 GB too big | the original weights | Hugging Face → |
| FP8 ← SAFETENSORS · Comfy-Org | 8.3 GB | 12.6 GB | fits · 3.4 GB spare | practically identical to the original | Hugging Face → |
| Q8_0 GGUF · jayn7 | 9.0 GB | 13.3 GB | fits · 2.7 GB spare | practically identical to the original | Hugging Face → |
| Q6_K GGUF · jayn7 | 7.0 GB | 11.3 GB | fits · 4.7 GB spare | very close to the original | Hugging Face → |
| Q5_K_M GGUF · jayn7 | 6.1 GB | 10.4 GB | fits · 5.6 GB spare | close; small differences in fine detail | Hugging Face → |
| Q4_K_M GGUF · jayn7 | 5.1 GB | 9.4 GB | fits · 6.6 GB spare | good; some loss in fine detail and text | Hugging Face → |
“Needed” adds 3.5 GB of working memory for HunyuanVideo 1.5 and a 0.8 GB reserve. Sizes 2026-10-01.
03Measured and reported results
Nobody has sent measured numbers for this pair yet. If you run HunyuanVideo 1.5 on a RTX 5080 16 GB, send your time per image and peak VRAM and it will appear here, credited.
04About the RTX 5080 16 GB
The RTX 5080 16 GB is a Blackwell GPU with FP8 and FP4 hardware: ComfyUI computes Comfy-Org's FP8 files natively here, and NVFP4 files (where a model offers them) are faster still.
16 GB GDDR7 · 256-bit · 960 GB/s · Blackwell. Everything that runs on it →
05Questions
How much VRAM does HunyuanVideo 1.5 need?
Around 9.4 GB with the smallest file (Q4_K_M) and 12.6 GB with an 8-bit file (FP8). The full 16-bit file needs about 21.0 GB.
Which HunyuanVideo 1.5 file should I download for the RTX 5080 16 GB?
FP8 (8.3 GB) from Comfy-Org/HunyuanVideo_1.5_repackaged.
FP8 or Q8_0 for HunyuanVideo 1.5 on the RTX 5080 16 GB?
FP8 (8.3 GB): the RTX 5080 16 GB computes it natively, while Q8_0 (9.0 GB) is unpacked on the fly.
How much do I need to download for HunyuanVideo 1.5 on the RTX 5080 16 GB?
20.7 GB: hunyuanvideo1.5_480p_t2v_cfg_distilled_fp8_scaled.safetensors, qwen_2.5_vl_7b_fp8_scaled.safetensors, byt5_small_glyphxl_fp16.safetensors, hunyuanvideo15_vae_fp16.safetensors.