There are some 250 Watt Power Supplies that AMD recommends. I just wonder if AMD is taking into consideration other power hungry components such as a Geforce 3. I am thinking about getting a 400 Watt Power Supply because my Sparkle 300Watt PS seems to have problems, but I am not sure where my issue is coming from. With Geforce 3, all games are unplayable on my comp with XP 1800. With Thunderbird 866 and Geforce, I had no problems.