Apple Mac Studio (M3 Ultra) — 256GB / 4TB
A desktop built on the Apple M3 Ultra with about 256GB of memory usable for AI — here’s what it runs and how it fits a private AI Business OS.
Configuration
- AI memory
- ~256GB unified
- Usable for models
- ~179.2GB
- System RAM
- 256GB
- Storage
- 4TB
- GPUs
- 1×
- Chip
- Apple M3 Ultra
Compatible models
Open models graded for this exact configuration.
- Gemma 2 27BGemma · ~27B · 8K ctx · Gemma Terms of Use
Fits at FP16 (~54GB) with ~125.2GB headroom — about 3 concurrent instances.
FP16 · ~54GBRuns well - Gemma 3 27BGemma 3 · ~27B · 128K ctx · Gemma Terms of Use
Fits at FP16 (~54GB) with ~125.2GB headroom — about 3 concurrent instances.
FP16 · ~54GBRuns well - Mistral Small 24BMistral · ~24B · 32K ctx · Apache-2.0
Fits at FP16 (~48GB) with ~131.2GB headroom — about 3 concurrent instances.
FP16 · ~48GBRuns well - DeepSeek-Coder V2 (class)DeepSeek · ~16B · 128K ctx · DeepSeek License
Fits at FP16 (~33GB) with ~146.2GB headroom — about 5 concurrent instances.
FP16 · ~33GBRuns well - StarCoder2 15BStarCoder · ~15B · 16K ctx · BigCode OpenRAIL-M
Fits at FP16 (~30GB) with ~149.2GB headroom — about 5 concurrent instances.
FP16 · ~30GBRuns well - Qwen2.5 14BQwen · ~14B · 128K ctx · Apache-2.0
Fits at FP16 (~30GB) with ~149.2GB headroom — about 5 concurrent instances.
FP16 · ~30GBRuns well - Qwen3 14BQwen · ~14B · 128K ctx · Apache-2.0
Fits at FP16 (~30GB) with ~149.2GB headroom — about 5 concurrent instances.
FP16 · ~30GBRuns well - Phi-3 Medium (14B)Phi · ~14B · 128K ctx · MIT
Fits at FP16 (~28GB) with ~151.2GB headroom — about 6 concurrent instances.
FP16 · ~28GBRuns well
Offers
- Demo StoreDemoIn stock · checked 2026-06-23$5,000Demo only
- Demo MarketplaceDemoIn stock · checked 2026-06-23$5,200Demo only
Pricing below is illustrative demo data — there are no live or affiliate links yet. Offers are kept separate from our editorial AI scores, which they never influence.
Turn the Apple Mac Studio (M3 Ultra) into a private AI Business OS
Run your own AI agents on hardware you control — private by design, no per-seat data leaving your premises. BrainOutput helps you pick the right machine and turn it into a working AI Business OS.