Can the RTX 3090 24 GB run HiDream-O1-Image?
Yes. 16-bit fits on the RTX 3090 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 3090 24 GB, send your time per image and peak VRAM and it will appear here, credited.
05About the RTX 3090 24 GB
The RTX 3090 24 GB (Ampere) has no FP8 compute. FP8 files still load and save memory, but ComfyUI converts them back before the maths, so there is no speed gain - Q8_0 GGUF is the closer-to-original 8-bit choice. ComfyUI can compute INT8 files natively on NVIDIA, which is worth a try where a model offers one.
24 GB GDDR6X · 384-bit · 936 GB/s · Ampere. 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 3090 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 3090 24 GB?
16.4 GB: hidream_o1_image_bf16.safetensors.