ok i only have a messley 250w psu which is probably fine for what i have now but what i want to know is! is there any programes that can tell you the amount of power your psu is having to dish out.....only asking cos people change there psu all the time but how do they know if they really need amore powerful one
http://www.jscustompcs.com/power_supply/ is a good site for figuring out your power requirments. I would still allow 10 to 20% more for future expansion or to cover any temporary surges.