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