Apple / HARDWARE FILE
Mac Studio M3 Ultra 256GB
very large unified memory with framework caveats
Installed memory256 GB
Usable assumption184.3 GB
Memory typeUnified
Software pathMetal
Q4 MAP
What can fit
COMFORTABLE
Gemma 3 4B
small multimodal assistant
4.5 GB estimatedInspect →COMFORTABLEStable Diffusion 1.5
local image generation
4.6 GB estimatedInspect →COMFORTABLEWhisper Large v3
speech recognition
5.1 GB estimatedInspect →COMFORTABLEDeepSeek Coder 6.7B
local coding assistant
6.2 GB estimatedInspect →COMFORTABLEMusicGen Large
local music generation
6.3 GB estimatedInspect →COMFORTABLEMistral 7B v0.3
general local inference
6.6 GB estimatedInspect →COMFORTABLEQwen2.5 7B
compact multilingual chat
6.8 GB estimatedInspect →COMFORTABLEDeepSeek-R1 Distill Qwen 7B
compact distilled reasoning
6.8 GB estimatedInspect →COMFORTABLELlama 3.1 8B
chat, RAG, general assistants
7.1 GB estimatedInspect →COMFORTABLEQwen3 8B
compact reasoning and chat
7.2 GB estimatedInspect →COMFORTABLEStable Diffusion XL
high-resolution image generation
8.6 GB estimatedInspect →COMFORTABLEGemma 3 12B
mid-size multimodal assistant
9.9 GB estimatedInspect →Check power supply, cooling, physical slot size, OS, drivers, runtime support, and total system cost before buying.