How to speed up PPSSPP on low end PCs?

[sodaddict]

My current PC is way far ahead of PPSSPP's maximum system requirements, although i carry the emulator everywhere i go on a USB (due to a crappy smartphone). Every time i get out of school i would go to my mother's work place and use the computers there.
Now to the topic, how can i speed up the PPSSPP emulator on these PCs? I tried em once and i got about 30 FPS instead of 60, which is kinda sluggish if you ask me. These PCs are little notebooks with 1 to 2 GB of RAM, a moderate Intel Atom processor, unknown GPU, and 520 GB HDD.
If anyone could fill me in on how to speed things up, i am happy to hear it.