pease help me, i have G4 dual processor, with additional 256memory, but it always freezes it only work for few minutes, always needs to reboot, everytime we bring it for repair they we need to add this and that, but its not helping, please give me an answer.
thank you

help please

Typical of Ram timing problems. As the ram gets warm it fails. In other words you possibly have a bad stick of ram. Check the crash log, it will tell you why.