Stable Diffusion 3.5 Large on Apple M4 (16GB Unified)
M4 (16GB Unified) runs Stable Diffusion 3.5 Large at FP16 — ~40s first response. Usable on 16 GB VRAM — see full quantization options below.
Model Size
8.1B
Device VRAM
16 GB
Bandwidth
120 GB/s
Quantization
FP16
Performance by Quantization
OwnRig currently has one published compatibility entry for Stable Diffusion 3.5 Large on Apple M4 (16GB Unified) at FP16. This is the best supported pairing we can stand behind today.
| Quantization | Speed | TTFT | Fits in VRAM | Rating | Confidence |
|---|---|---|---|---|---|
| FP16 | – | 40000ms | ✓ Yes | Acceptable | estimated |
Notes
FP16
M4 base chip: ~0.5x M4 Pro performance due to lower memory bandwidth.
About Stable Diffusion 3.5 Large
Stable Diffusion 3.5 Large (8.1B) is a image gen model. Latest Stable Diffusion architecture with significantly improved prompt adherence, typography, and composition over SDXL. Higher VRAM requirement (12GB+ at FP16) but produces noticeably better images. The current standard for local image generation.
View all Stable Diffusion 3.5 Large hardware options →About Apple M4 (16GB Unified)
Apple M4 (16GB Unified) has 16 GB at 120 GB/s. Available in Mac Mini, MacBook Pro 14", MacBook Air 13", MacBook Air 15", iPad Pro.
See all models Apple M4 (16GB Unified) can run →Estimate method: Estimated from M4 Pro benchmarks scaled by memory bandwidth ratio (120/273 GB/s). Reference hardware source: github.com (2026-03-14)
Performance varies by driver version, inference engine, quantization method, context length, and system configuration. Figures shown are estimates based on community benchmarks and may not reflect your exact setup. Product names are trademarks of their respective owners. OwnRig is independent and not affiliated with any hardware or AI model provider.