Can Flux.1 Fill Dev run on Mac Studio M3 Ultra 256GB?
YES — Runs Great
S90Excellent
Flux.1 Fill Dev needs ~32.0 GB VRAM. Mac Studio M3 Ultra 256GB has 184.3 GB.
32.0 GB required184.3 GB available
17% VRAM used
Parameters
12B
Precision
FP16
Max Resolution
1024×1024
VRAM
32.0 GB / 184.3 GB
Gen Time
~2m 36s
Performance by workload
| Workload | Grade | Fit | VRAM | Gen Time |
|---|---|---|---|---|
| Quick | S | Runs natively | 31.5 GB | ~2m 36s |
| Standard | S | Runs natively | 32.0 GB | ~2m 36s |
| High Quality | S | Runs natively | 32.0 GB | ~2m 36s |
Resolution compatibility
How Flux.1 Fill 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 | 31.5 GB | S● |
| 768×768 | 31.7 GB | S● |
| 1024×1024 | 32.0 GB | S● |
Memory breakdown
Required: 32.0 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 Fill Dev?
Yes, Mac Studio M3 Ultra 256GB can run Flux.1 Fill Dev for image generation. Runs natively.
How much VRAM does Flux.1 Fill Dev need?
Flux.1 Fill Dev (12B parameters) requires approximately 32.0 GB at FP16. Mac Studio M3 Ultra 256GB provides 184.3 GB.
What resolution can Flux.1 Fill Dev produce on Mac Studio M3 Ultra 256GB?
On Mac Studio M3 Ultra 256GB, Flux.1 Fill Dev can generate images at up to 1024x1024. Generation time is approximately 155.8 seconds per image.
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<iframe src="https://willitrunai.com/embed/flux-1-fill-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>
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