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by jauntywundrkind 26 days ago
From the replies,

> A shame, really, as the Ryzen 7640U, 7840U, 7840HS, and 7940HS all support 256GB of RAM.

To be fair, those platforms support dual dimms per channel, which Strix Halo would not, at least not at it's high speeds.

But reciprocally Gorgon Halo 400 just launched and it supports... 192GB. And is the exact same APU.

Memory chips did finally have their first big doubling per chip semi recently (available last February), with 48 & 64GB dimms becoming available. There is some reasonable lag here, that Strix Halo & Gorgon Halonuse lpddr5x, which perhaps had some lag, that 32GB (x4) was the best available. But now with Gorgon Halo being 192GB capable but not 256GB, it sure feels looks & seems like this is just bad spirited fuckery from AMD. https://forum.level1techs.com/t/where-are-the-ddr5-unbuffere...

1 comments

I assume they validated certain DRAM chips when the 395 first came out and they're just not going to validate any more. So newer DRAM is validated for the 495. We can't compare DDR5 and LPDDR5 since they are completely different; if 256 GB DDR5 is possible that doesn't mean anything.
But 192GB lpddr5x on Goron Halo 495 does strongly strongly suggest 256GB would be too. It took some big work to go from 32GB to 64GB dimms, was a long long long time coming. 48GB came latter.

Its very unlikely that with 192GB Gorgon Halo that anything really blocks 256GB Gorgon Halo, or Strix Halo. Higher than 32GB chips are possible and exist.