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M5 Ultra Mac Studio Review

269 points · 262 comments · piotrgrabowski

  1. simonw · · focus · HN ↗
    The numbers I was most interested in are tucked away in a chart towards the bottom - the speed comparison of the Mac Studios v.s. a RTX 5090:

      Qwen3.8 27B tokens/sec generation speed
    
      Prompt size    8K    64K   128K   256K
      RTX 5090 PC    59    51    44     n/a
      M5 Ultra       48    39    32     24
      M3 Ultra       31    23.5  20     15
    
    A whole bunch more comparison numbers in this section: <a href="https:&#x2F;&#x2F;www.macstories.net&#x2F;stories&#x2F;m5-ultra-mac-studio-review-the-dream-mac-for-local-ai-agents&#x2F;#mx-pc" rel="nofollow">https:&#x2F;&#x2F;www.macstories.net&#x2F;stories&#x2F;m5-ultra-mac-studio-revie...
    1. gpugreg · · focus · HN ↗
      Those RTX 5090 numbers are bad. You can get over 200 tps with ninfer using NVFP4 and MTP.
      1. ActorNightly · · focus · HN ↗

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        1. abletonlive · · focus · HN ↗
          Tok&#x2F;sec is 0 on a 3090 for most of the models that the mac can run
          1. ActorNightly · · focus · HN ↗

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            1. abletonlive · · focus · HN ↗
              &gt; So given that, which one of these is true about you?

              Well, if those are the only two options you can come up with it&#x27;s pretty clear that this isn&#x27;t about me or what I am, you have a false model of reality.

              &gt; Running very large models on Mac is unusable at 10 tok&#x2F;sec.

              There are plenty of examples of models running at well over 10 tok&#x2F;sec that aren&#x27;t viable on the 3090. In fact such examples are found in the review in the OP. Did you not read the article?

              I think you&#x27;re projecting pretty hard with the two options you&#x27;ve listed. Go touch some grass, you seem overly frustrated that reality doesn&#x27;t meet your expectations.

              1. ActorNightly · · focus · HN ↗
                Since you clearly don&#x27;t use local llms, allow me to educate you - anything under 100 tok&#x2F;sec is USELESS. When you are coding, the idea is that you want to have a system that can generate files fast, hopefully correct on the first try. Cloud models do this. Local models, by nature of having less parameters and more quantization, often require more guidance and repeated inference to get it right. The antigenic harnesses that people set up around local llms leverage this.

                Looking at the article, which you clearly didn&#x27;t read,the m5 ultra runs Qwen3.8, which fits on one GPU conveniently, at ~20 tok&#x2F;sec. This is a fucking joke. It will take roughly a minute to generate one code file. Congrats if you want privacy I guess, but for straight up coding, you are better just using cloud models.

                Meanwhile, I have an $800 mini PC, $200 Occulink gpu dock, a $2000 3090 and a $300 power supply, and I can run Qwen at over 100 tok&#x2F;sec prefill, not to mention insanely quicker during inference. So its pointless to spend Mac M5 Ultra prices on Apple shit when they can have something much faster for cheaper

                The whole thing of &quot;well I can run bigger models that don&#x27;t fit on a GPU&quot; is either paid Apple advertising, or you are just an igorant fanboy.

                So I ask you again, which one are you?

                1. directdev · · focus · HN ↗

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