this post was submitted on 25 Feb 2025
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I wasn't really thinking of HPC but my next gaming rig, TBH. The OS can move often accessed pages into faster RAM just as it can move busy threads to faster cores, gaining you some fps a second or two after alt-tabbing back to the game after messing around with firefox. If it wasn't for memory controllers generally driving channels all at the same speed that could already be a thing right now. It definitely already was a thing back in the days of swapping out to spinning platters.
Not sure about HBM in CPUs in general but with packaging advancement any in-package stuff is only going to become cheaper, HBM, pedestrian bandwidth, doesn't matter.