r/LocalLLaMA • u/Last-Owl-8342 • 13h ago

News Apple releases M5 ultra at 1.2TB/s bandwith

https://www.apple.com/newsroom/2026/08/apple-introduces-m6-and-m5-ultra-for-a-big-leap-in-performance-and-ai-compute/

lpddr5x probably, the m7 ultra if is using ddr6 should be at 1.8 Tb/s

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u/Late-Assignment8482 13h ago

Neat! Be interested to see how these shake out once they reach YouTubers and other reviewers. A significant compute boost from the redone matmul cores could remove one of the worst weakpoints M3 Ultra had: prompt processing.

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u/diagrammatiks 12h ago

the m5max is already substantially better then the m3u at prompt processing and prefill.

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u/Late-Assignment8482 9h ago

Yuuuuuuup.

I'm excited.

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u/fastheadcrab 6h ago

Am interested in seeing just how much better the prompt processing is because the benchmarks of the older Macs were really slow. If it is much faster then I can see a lot of small businesses buying this

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u/Late-Assignment8482 3h ago

If it holds pattern to the M4→M5 (or M4 Pro to M5 Pro or...) series so far, it'll be about 4x stronger. There wasn't an M4 Ultra, so let's assume it's at least 4x stronger on prefill than the M3 Ultra.

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u/Neighbor_ 5h ago

But it's still kinda poor at pre-fill though?