Hi,

i just recently noticed that after some time the computer goes force shut down...
im playing on sony vaio vpceb4z1e and it works like a charm and i guess it has something to do with the fact that i have all USB ports in use ( iphone charging, mouse, usb fan pad)
so maybe something with PSU because of the this?
im planning to check GPU temperatures sometimes...i have ati 56650 in it
thanks

Sounds like overheating. Blow the dust out of the CPU fan/vent with an air compressor.