Can I Run DeepSeek V3.2 671B on Apple M3 Ultra?

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

Written by Jakub Rusinowski · Last updated August 15, 2026

Not at Q4_K_M — that needs 405.1 GB and the Apple M3 Ultra has 512 GB. Drop to Q3_K_M and it fits in 287.4 GB, with up to 128K of context.

The numbers

Model	DeepSeek V3.2 671B
Parameters	671B/37B active
Quantization	Q4_K_M
VRAM needed	405.1 GB
Apple M3 Ultra VRAM	512 GB
Verdict	Runs at a lower quant
Fits at	Q3_K_M (287.4 GB)
Max context	128K

What to do next

Quantize to Q3_K_M. That is the cheapest fix — it costs some quality but no money.

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Running DeepSeek V3.2 671B on this card:

Apple Mac Studio M3 Ultra

512 GB VRAM · 60 W board power

2026 prices are volatile — check the current listing.

Check price on Amazon

Won't fit — rent DeepSeek V3.2 671B instead

DeepSeek V3.2 671B needs ~405 GB but this GPU has 512 GB. Rent a 8× H100 (640 GB)-class GPU by the hour instead of buying one:

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RunPod $23.12/hr

Rent on RunPod →

Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.

Other DeepSeek V3.2 sizes on the Apple M3 Ultra

DeepSeek V3.2 685B — runs at a lower quant (413.6 GB)

DeepSeek V3.2 671B on nearby hardware

Apple M2 Ultra (192 GB) — does not fit

All DeepSeek V3.2 sizes on the Apple M3 Ultra | VRAM calculator for DeepSeek V3.2 671B | Apple M3 Ultra GPU page | Check your hardware