Are my SK Hynix memory chips failing me?

Are my SK Hynix memory chips failing me?

In the summer of last year, I read a nerdy piece about high-bandwidth memory (HBM) and the Korean company SK Hynix, which was the first to start mass-producing memory chips stacked upon each other, instead of placing them individually on the motherboard. Apparently, this increased data-transfer speeds and capacity dramatically, while boosting energy efficiency. To...