PPSSPP Windows - more CPU or GPU demanding?

[LunaMoo]

If it would be gpu demanding you wouldn't run it on gma x4500, it certainly isn't cpu demanding either althrough it all differs between games and while average is pretty low, definitely some games which are much harder to emulate exist.

GPU upgrade would possibly allow you a bit higher rendering res ~ through in case of nvidia gt630 probably not much ~ depending on the model, more importantly would increase compatibility through much better ogl support which in quite a few games is a difference between playable and not, however you will be disappointed with texture scaling ~ that little monster runs on CPU.