The folks above that said: "the power supply" are 100% correct!!!  Your 7300  has it's  own power  hookup  from your power  supply  and  the  350  watt  PS  is  definately  not  up  snuff!!!!  Had the same thing happen to me and I slapped in a 500 watt PS and haven't had the problem since!!!

Gerard

The GR00VY GH0ULIE!

You are pure, you are snow
We are the useless sluts that they mould
Rock n roll is our epiphany
Culture, alienation, boredom and despair