Mac Studio, M5 Ultra, 256GB vs Mac Studio, M5 Ultra, 512GB
Only Mac Studio, M5 Ultra, 512GB holds Qwen3-235B-A22B at Q8_0. Mac Studio, M5 Ultra, 256GB is 4GB short.
- Fit
- Won't fit
- Fits
- Headroom
- −4GB
- 252GB
- Est. speed
- —
- 25.7 tok/s
- Cheapest today
- $9,499 at Apple
- no price yet
- Per GB of memory
- $37
- —
- Memory
- 256GB unified memory
- 512GB unified memory
- Usable for a model
- 248GB
- 504GB
- Memory bandwidth
- 1.2TB/s
- 1.2TB/s
- Storage
- 1TB
- 1TB
- Lowest recorded
- $9,499 in 2d
- none yet
Fit, headroom and speed are computed from each vendor’s published bandwidth and the model’s own size at 8K context. Prices are the cheapest listing we could read on each seller’s page. The arithmetic is here.
Where they actually differ
- Qwen3-235B-A22BWon't fitFits
- DeepSeek-V3Won't fitWon't fit
- Llama-3.3-70BFitsFits
- gpt-oss-120bFitsFits
- Mistral-Large-2411FitsFits
- Llama-4-Scout-17B-16EFitsFits
- Qwen3-32BFitsFits
- Gemma-3-27BFitsFits
- gpt-oss-20bFitsFits
- Llama-4-Maverick-17B-128EWon't fitFits
- Llama-4-BehemothWon't fitWon't fit
Every model we track at Q8_0. The rows where the two boxes agree are dimmed, because they are not what you are choosing between.