Can Flux.1 Dev run on Mac Studio M3 Ultra 256GB?
YES — Runs Great
S90Excellent
Flux.1 Dev needs ~24.0 GB VRAM. Mac Studio M3 Ultra 256GB has 184.3 GB.
| Precision | VRAM Needed | Status | Grade |
|---|---|---|---|
| FP16Best | 24.0 GB | Runs natively | S |
| FP8 | 13.0 GB | Runs natively | S |
24.0 GB required184.3 GB available
13% VRAM used
Parameters
12B
Precision
FP16
Max Resolution
1024×1024
VRAM
24.0 GB / 184.3 GB
Gen Time
~2m 45s
Performance by workload
| Workload | Grade | Fit | VRAM | Gen Time |
|---|---|---|---|---|
| Quick | S | Runs natively | 23.6 GB | ~2m 45s |
| Standard | S | Runs natively | 24.0 GB | ~2m 45s |
| High Quality | S | Runs natively | 24.0 GB | ~2m 45s |
Resolution compatibility
How Flux.1 Dev (12B params) performs at each resolution on Mac Studio M3 Ultra 256GB (184.3 GB usable).
| Resolution | VRAM Required | Mac Studio M3 Ultra 256GB |
|---|---|---|
| 512×512 | 23.6 GB | S● |
| 768×768 | 23.8 GB | S● |
| 1024×1024 | 24.0 GB | S● |
Memory breakdown
Required: 24.0 GBAvailable: 184.3 GB
Weights24.0 GB
VAE0.2 GB
Text Encoder9.6 GB
Activations0.8 GB
Overhead0.5 GB
Frequently asked questions
Can Mac Studio M3 Ultra 256GB run Flux.1 Dev?
Yes, Mac Studio M3 Ultra 256GB can run Flux.1 Dev for image generation. Runs natively.
How much VRAM does Flux.1 Dev need?
Flux.1 Dev (12B parameters) requires approximately 24.0 GB at FP16. Mac Studio M3 Ultra 256GB provides 184.3 GB.
What resolution can Flux.1 Dev produce on Mac Studio M3 Ultra 256GB?
On Mac Studio M3 Ultra 256GB, Flux.1 Dev can generate images at up to 1024x1024. Generation time is approximately 165.0 seconds per image.
Embed this result▼
Paste this snippet into any page to show a live fit card.
<iframe src="https://willitrunai.com/embed/flux-1-dev-on-m3-ultra-256gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
Preview: