Slowdown on new level or when the new segment of level is loading. Need more RAM?

[LunaMoo]

Well that's always a possibility, wouldn't be soo sure about wipeout as that series supposedly ran decently even on older/slow android devices, but I guess all of those classic compilations are actually emulated and emulation inside emulation is never a good thing:]. You could always check by running in window and checking cpu/gpu load with some software during those slowdowns(if you don't know any ~ windows task manager for cpu is enough, you can use something like "gpu-z" to check gpu load).

If you don't get limited by cpu or gpu it could also be something like this problem. It's rather rare issue with just some power saving hdd's that spin down/fall asleep too quickly. PPSSPP can cache whole iso to ram to work around it, but since that's not really an option with 2gb of ram, you could try running iso from a pendrive.

If you wouldn't be limited by hardware nor that rare issue, then I dunno;c, but certainly not amount of ram ~ your web browser probably used up more ram while you browsed the forums or google for solution than ppsspp requires without using any crazy settings O.o.