Interesting. So a 32-chip GDDR6 clamshell design could pack 64GB VRAM with about 2TB/s on a 1024bit bus, consuming around 100W for the memory subsystem? With current chip prices [1], this would cost just about 200$ (!) for the memory chips, apparently. So theoretically, it should be possible to build fairly powerful AI accelerators in the 300W and < 1000$ range. If one wanted to, that is :)

1. https://dramexchange.com/