Stable Diffusion 3.5 Large on Apple M4 Max (128GB Unified)
Apple M4 Max (128GB Unified) handles Stable Diffusion 3.5 Large well at FP16. A solid choice for this model.
Model Size
8.1B
Device VRAM
128 GB
Bandwidth
546 GB/s
Quantizations Tested
1
Performance by Quantization
Each row shows Stable Diffusion 3.5 Large performance at a different quality level on Apple M4 Max (128GB Unified).
| 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 →Source: MLX performance estimates based on device bandwidth (2026-03-15)
Data last updated: 2026-03-15