Flux.1 Dev needs ~24.0 GB VRAM. RTX 4090 24GB has 24.0 GB.
| Precision | VRAM Needed | Status | Grade |
|---|---|---|---|
| FP16Best | 24.0 GB | Runs with offload | B |
| FP8 | 13.0 GB | Runs natively | S |
Parameters
12B
Precision
FP16
Max Resolution
256×256
VRAM
24.0 GB / 24.0 GB
Gen Time
~18s
| Workload | Grade | Fit | VRAM | Gen Time |
|---|---|---|---|---|
| Quick | B | Runs with offload | 23.6 GB | ~18s |
| Standard | B | Runs with offload | 24.0 GB | ~18s |
| High Quality | B | Runs with offload | 24.0 GB | ~18s |
How Flux.1 Dev (12B params) performs at each resolution on RTX 4090 24GB (24.0 GB usable).
| Resolution | VRAM Required | RTX 4090 24GB |
|---|---|---|
| 512×512 | 23.6 GB | B● |
| 768×768 | 23.8 GB | B● |
| 1024×1024 | 24.0 GB | B● |
Yes, RTX 4090 24GB can run Flux.1 Dev for image generation. Runs with offload.
Flux.1 Dev (12B parameters) requires approximately 24.0 GB at FP16. RTX 4090 24GB provides 24.0 GB.
On RTX 4090 24GB, Flux.1 Dev can generate images at up to 256x256. Generation time is approximately 18.0 seconds per image.
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<iframe src="https://willitrunai.com/embed/flux-1-dev-on-rtx-4090-24gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
Preview:
