Can the RTX 4090 24 GB run HiDream-O1-Image?
Yes. 16-bit fits on the RTX 4090 24 GB with 4.8 GB to spare.
Take 16-bit (16.4 GB). In use it comes to about 19.2 GB, with 4.8 GB left over on 24 GB.
01What to download
| Part | File | Folder | Size | |
|---|---|---|---|---|
| Checkpoint | hidream_o1_image_bf16.safetensors 16-bit · Comfy-Org/HiDream-O1-Image | models/checkpoints | 16.4 GB | Download → |
| Total download · keep about the same free on disk | 16.4 GB | |||
One file: this model has no separate text encoder or VAE. Sizes from Hugging Face, 2026-10-01.
02Every HiDream-O1 file on 24 GB
| File | Size | Needed | On this card | Quality | Download |
|---|---|---|---|---|---|
| 16-bit ← SAFETENSORS · Comfy-Org | 16.4 GB | 19.2 GB | fits · 4.8 GB spare | the original weights | Hugging Face → |
| FP8 SAFETENSORS · Comfy-Org | 8.1 GB | 10.9 GB | fits · 13.1 GB spare | practically identical to the original | Hugging Face → |
“Needed” adds 2 GB of working memory for HiDream-O1 and a 0.8 GB reserve. Sizes 2026-10-01. The Comfy-Org files are complete checkpoints (loaded from the checkpoints folder); there is no separate text encoder or VAE to add. No GGUF version was found.
03The text encoder
This model has no separate text encoder: reading the prompt is built into the model itself, so its memory is already in the file sizes above.
04Measured and reported results
Nobody has sent measured numbers for this pair yet. If you run HiDream-O1 on a RTX 4090 24 GB, send your time per image and peak VRAM and it will appear here, credited.
05About the RTX 4090 24 GB
The RTX 4090 24 GB is an Ada Lovelace GPU with hardware FP8, so ComfyUI can compute Comfy-Org's FP8 files natively: small and fast. (Plain FP8 files use FP8 maths with the --fast fp8_matrix_mult option.)
24 GB GDDR6X · 384-bit · 1008 GB/s · Ada Lovelace. Everything that runs on it →
06Questions
How much VRAM does HiDream-O1 need?
Around 10.9 GB with the smallest file (FP8) and 10.9 GB with an 8-bit file (FP8). The full 16-bit file needs about 19.2 GB.
Which HiDream-O1 file should I download for the RTX 4090 24 GB?
16-bit (16.4 GB) from Comfy-Org/HiDream-O1-Image.
How much do I need to download for HiDream-O1 on the RTX 4090 24 GB?
16.4 GB: hidream_o1_image_bf16.safetensors.