I have a fic aZ11e mb and a 1gig thunderbird with a 300w supply. The system will lose power and not power back up for about 15 min. It may run fine for 5 hours or 5 min. If i use a friends 250 supply it will power up immediately. Is this a bad supply, bad mb, or possibly and incompatibility between the two. nothing is getting hot that i can tell. any ideas? This is a newly assembled system.