Apple M3 Ultra — Local LLM Performance & Compatibility

Name: LLM Configurator — GPU VRAM Checker
Author: LLM Configurator

作者： Jakub Rusinowski · 最后更新： 2026年7月12日

Apple's highest-end Mac Studio configuration launched with up to 512 GB unified memory at 819 GB/s — enough for 70B+ and some 100B+ class models at Q4/Q5. Note: in March 2026 Apple lowered the maximum purchasable configuration to 256 GB due to DRAM shortages; 512 GB units already in the field retain full capability.

Technical Specifications

VRAM	512 GB unified memory
Memory Bandwidth	819 GB/s
TDP	60 W
Architecture	ARM, 3nm TSMC
Release Year	2025
MSRP at Launch	$3,999
Inference Speed (Llama 3.1 8B Q4_K_M)	43–90 tok/s (estimated)
Inference Speed (Llama 3.3 70B Q4_K_M)	6.5–13 tok/s (estimated)

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Apple Mac Studio M3 Ultra

512 GB VRAM · 60 W board power

2026年价格波动较大——请以当前商品页价格为准。

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LLMs Compatible with 512 GB Unified Memory

All models below run comfortably in 512 GB unified memory with Q4_K_M quantization.

DeepSeek V3	DeepSeek V3 (685B MoE) · 414 GB VRAM · Q4_K_M · `ollama run deepseek-v3`
DeepSeek R1	DeepSeek R1 (671B) · 406 GB VRAM · Q4_K_M · `ollama run deepseek-r1:671b`
Qwen3-Coder	Qwen3-Coder 480B-A35B (MoE) · 291 GB VRAM · Q4_K_M · `ollama run qwen3-coder:480b-a35b`
MiniMax M3	MiniMax M3 428B-A23B · 259 GB VRAM · Q4_K_M · minimax-m3
Llama 4	Llama 4 Maverick 17B · 242 GB VRAM · Q4_K_M · `ollama run llama4:maverick`
Qwen 3.5	Qwen 3.5 397B-A17B · 240 GB VRAM · Q4_K_M · qwen3-5
Nex-N2	Nex-N2 Pro · 240 GB VRAM · Q4_K_M · nex-n2
GLM-5.3-Flash	GLM-5.3-Flash 320B-A18B · 194 GB VRAM · Q4_K_M · glm-5-3-flash

75 more families also fit 512 GB — browse the full model library.

Best Use Cases

70B+ models
largest local LLMs
Mac Studio
research

Quick Start with Ollama

Install Ollama then run the recommended model for this GPU:

ollama run llama3.3:70b

FAQ

Can the Apple M3 Ultra run local LLMs?

Yes — the Apple M3 Ultra has 512 GB unified memory and runs Apple's highest-end Mac Studio configuration launched with up to 512 GB unified memory at 819 GB/s — enough for 70B+ and

How fast is the Apple M3 Ultra for AI inference?

The Apple M3 Ultra is estimated to run Llama 3.1 8B at 43–90 tok/s with Q4_K_M quantization. For Llama 3.3 70B the estimate is 6.5–13 tok/s. These are modelled estimates, not measurements — see /en/methodology.

What LLMs can I run on 512 GB VRAM?

With 512 GB you can run: DeepSeek V3, DeepSeek R1, Qwen3-Coder, MiniMax M3, Llama 4. Use Ollama for the easiest setup: ollama run llama3.3:70b.

Can I Run It? — Apple M3 Ultra

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Buying Guide

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