It is not compatible with desktop PC. It is a different manufactured kind of ram. The increase price is from companies flooding in high amounts of large orders. So consumer ram for PCs is getting backlogged so to say. Or just slowed down
GPU = Bitcoin farming. Prices rose during COVID because of the shipping safety that went in place, plus all the nerds farming for Bitcoin who wanted 4 gpus at once, and that's also when the PS5 launched (not a PCIE GPU, but still contributed)
RAM = needed to process ai tasks faster. Now with huge factory size ai data centers, lots of order got lots and lots of ram. I'd expect this to be the norm every 10ish years when ram gets updated
https://lemmy.world/post/39695009