best you can do is a Rail mod...
google it.
ya, so i just bought a new one finally *sigh*
to answer ceewi1, i have a q6600 and a 8800GTS, and with all other drives.. online PSU calculators indicate that i needed around 650. So it always crashed whenever i play games or have it running for too long.
It's recently that I notice that my 500 watt PSU might not be enough. I just changed it to a 700 ocz. And no more crashing again.