Everything is cool but tell my why cheap Dingoo A320 can run psx games like this:

http://www.youtube.com/watch?v=m4h31PpPH_E

http://www.youtube.com/watch?v=8iwfoy-ttb4


Dingoo hardware:
- CPU Ingenic JZ4732 @ 336MHz, underclocked from 400MHz (MIPS architecture)
- RAM 32MB at 133MHz

N900 hardware:
- CPU TI OMAP 3430: ARM Cortex-A8 @ 600 MHz, PowerVR SGX with OpenGL ES 2.0 support (ARM architecture)
- RAM 256MB, 768MB virtual memory


PSX had CPU in MIPS architecture so may it be a reason for so much better performance of Dingoo A320 which is also MIPS?