PPSSPP Windows - more CPU or GPU demanding?

[belmont1990]

I have a question related to performance of ppsspp win wersion.
Is this emulator more cpu or gpu dependant when it comes to performance?
Right now I have core 2 duo E8400 @3.0 ghz with gma x4500 integrated vga, and planning to add GT 630 to make a low budget gaming PC for emulation purposes (and some gaming, like RE5,6, rev2, SH5, gta 4, outlast etc. on medium, 576p/720p)

My question is - will better gpu have performance boost in ppsspp emulator?
Right now it works very good, but on 2x resolution and 2x xBRZ scaling, dsound I have some slight choppy animation while more things are going on or while I enter new areas and want to elimate those completly as well as going to 3x-4x res. and scaling 4x.