Slowness and Computers

From what I understand , Xcom is slowed down by my mods. I tried to lose any mods as I was willing, but even if the campaign starts fast and normal, it quickly slows down to uncomfortable jagged lagginess before I kill the first Chosen.

Could this ever be helped by waiting a few years and getting a more powerful PC, or is this just a choke in how the game is made, regardless of how powerful a PC might be?