I have a PC with a Threadripper 2990WX in it. It's on a ASRock Taichi motherboard. Could this be swapped out for a Ryzen 9 3950X?
Thanks in advance
no, the 3950X is an AM4 cpu.
You need an AM4 socket board.
as others have mentioned
they are two completely different platform
you got 32 cores so why are you downgrading back to 16 cores?