[tamlin]

Samsung and SK-Hynix have had specs and papers for a few years already for HBM and GDDR. e.g.

* https://www.servethehome.com/sk-hynix-ai-memory-at-hot-chips... * https://www.servethehome.com/samsung-processing-in-memory-te...

Not sure anyone has started using it in production.

[nsteel]

And as mentioned in a comment elsewhere, LPDDR6-PIM is coming along too https://wccftech.com/samsung-collaborates-with-sk-hynix-in-p...

We'll see that before anything built around HBM or GDDR.