'Recompiled' is not the same as emulated by any stretch. Native PSP games could perfectly run under an Atom if they used SSE2 instructions and GL 2.1 plus some hacks to mimick some FX (or just some reduced graphic settings).

I've got GL 2.1 running under n270 perfectly well, up to the point to test Yandex Maps to roam around Prypiat.

Even for emulation PPSSPP was far less demanding than PCSX2.

I used to play GTA San Andreas on an n270 netbook, I believe at 1024x600. Didn’t run well, but was definitely playable.