yeah those quad liquid cooled ones , its like they all have issues, i think it was basically apple was pushing the thermal envelope so far trying to get that G5 as far as they could take it,, just put all kinds of insane stresses Thermally, Electrically, Mechanically- The poor power supply and the motherboard, hit that power button and the lights in the house dim, :-D i've seen some very nasty pictures of what looked like a little leek, witch when covers were taken off looked disastrous on the other side.