Lao Guo's Learning Space
Nov 12, 2026 · Industry Insights
M5 Ultra 512GB Arrives: 768GB Vaporware, 384GB GPU Limit, Which Memory for Your LLM?
Apple's M5 Ultra Mac Studio now offers a 512GB unified memory option priced from $22,299 with 10-12 week delivery, but the 768GB tier remains unconfirmed vaporware; macOS defaults GPU wired memory to 384GB, so extra capacity only helps run larger models, not speed, and buyers should match memory to specific model sizes.
Apple SiliconGPU wired limitLLM inference
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