Stable Diffusion 3.5 Large on Apple M4 Max (128GB Unified)
Yes — M4 Max (128GB Unified) handles Stable Diffusion 3.5 Large well at FP16 — ~10s first response. Solid daily-driver performance on 128 GB VRAM.
Model Size
8.1B
Device VRAM
128 GB
Bandwidth
546 GB/s
Quantization
FP16
Performance by Quantization
OwnRig currently has one published compatibility entry for Stable Diffusion 3.5 Large on Apple M4 Max (128GB Unified) at FP16. This is the best supported pairing we can stand behind today.
| Quantization | Speed | TTFT | Fits in VRAM | Rating | Confidence |
|---|---|---|---|---|---|
| FP16 | – | 10000ms | ✓ Yes | Good | estimated |
Notes
FP16
Bandwidth-bound. ~10s per image. 115GB headroom for batch generation.
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 Max (128GB Unified)
Apple M4 Max (128GB Unified) has 128 GB at 546 GB/s. Available in MacBook Pro 16", Mac Studio.
See all models Apple M4 Max (128GB Unified) can run →Estimate method: MLX performance estimates based on device bandwidth. Reference hardware source: github.com (2026-03-15)
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.