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5090 (1) vs Mac Studio M5 Ultra 256gb

This story is from 2026-08-31. It is preserved in the archive; the latest stories are on the live feed.

Trying to choose between an RTX 5090 build and a Mac Studio M5 Ultra with 256GB unified memory. I keep coming back to the same tradeoff: raw speed and CUDA on the 5090 versus the much larger memory pool on the Mac Studio. My understanding: 5090: much faster for models that fit in 32GB VRAM, CUDA su…

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  1. 2026-08-31 00:35 · r/LocalLLM
    5090 (1) vs Mac Studio M5 Ultra 256gb

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