I just got an AMD Duron 600 and in the manual it says "ONLY AMD-recommended power supplies should be used." I'm just upgrading a computer for my brother which we are going to use his existing ATX case. The case is from when we built a AMD k6 200mhz computer. It has 230w power supply and according to the Duron manual, the minimum is 150w. I'm running this on a new Abit KT7 Raid board. I know the original Athlons required a certified power supply, which I have in my own system. Anyone having trouble running a Duron w/ a no name power supply or other suggesions?