This video reviews the hardware and what software is capable on 2 common $30-$40 PSP like clones made to run 8bit & 16bit games.

MP5 Gameplayer

Processor: ATJ22590 32bit 288Mhz?

PAP Gameta II Plus

Processor: JZ4760 32bit 528Mhz / 600Mhz Max Not a true dual core, second core is for video processing