Gemma 3 27B on Apple M4 Pro (48GB)

M4 Pro (48GB) runs Gemma 3 27B at Q5_K_M — 8 tok/s. Usable on 48 GB VRAM — see full quantization options below.

Model Size

27.23B

Device VRAM

48 GB

Bandwidth

273 GB/s

Quantization

Q5_K_M

Benchmarks

Performance by Quantization

OwnRig currently has one published compatibility entry for Gemma 3 27B on Apple M4 Pro (48GB) at Q5_K_M. This is the best supported pairing we can stand behind today.

Quantization	Speed	TTFT	Fits in VRAM	Rating	Confidence
Q5_K_M	8 tok/s	1200ms	✓ Yes	Acceptable	estimated

Notes

Q5_K_M

Same bandwidth as 24GB variant. Extra memory enables Q5_K_M for better quality at same speed.

About Gemma 3 27B

Gemma 3 27B (27.23B) is a chat, coding, reasoning, multi-purpose model. Google's largest open-weight model before Gemma 4. Capable reasoning and instruction following. At 27B parameters, it sits between 8B models (too limited) and 70B models (too expensive). Wide multilingual support. Fits on 24 GB GPUs at Q4.

View all Gemma 3 27B hardware options →

About Apple M4 Pro (48GB)

Apple M4 Pro (48GB) has 48 GB at 273 GB/s. Available in MacBook Pro 16-inch, Mac Mini.

See all models Apple M4 Pro (48GB) can run →

Estimate method: MLX performance estimates. 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.