Comment by jauntywundrkind

Feels likely to be a pretty direct test of memory bandwidth. Strix Halo (the AI Max+ 395) has quad ddr5-8000, which is both twice the width and more mhz. This is a great opportunity to see what workloads will make use of the 3d-vcache too!

I'm personally pretty excited for a new round of Mobile on Desktop. Usually a pretty good % of desktop speed, but tuned for much lower power, and the price is usually a little better. I have the Minisforum 795s7 with the 7945hx, which is a delightful zen4 that's very affordable. https://www.tomshardware.com/pc-components/cpus/amd-unleashe...

wmf 2 days ago

I don't know if the CCDs can actually use that much bandwidth. It's really for the GPU.

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jauntywundrkind a day ago

There were sometimes quite notable differences between 32-core ThreadRipper at quad channel ddr5 6400mhz vs 4800mhz. https://www.phoronix.com/review/threadripper-9000-ddr5-6400-...
Indeed yes it seems like the dual channel 6000MHz wasn't the limiting factor in many* tests. But also the lower power 395 has a couple massive wins, and I suspect it was almost entirely the memory bandwidth. For example the LLM test on page 2: it was that memory bandwidth making that colossal difference.
There were also tests like OpenVINO where memory bandwidth was the factor, but the x3d's cache was evidently big enough, with it easily scoring first place, the Strix Halo second, then the regular 9950 last place!
In a lot of tests, it seems like the extra 100w the 9950's were getting probably helped a lot!

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