Originally Posted by Ste
There are no completely accurate PSU Calculators. Do as peter suggested..
Most tend to over estimate, they assume you will buy a cheap power supply..
I have a question... maybe you can answer...
Let's say you have a 12v rail with 50 amps on it.
If you're running an 8800GT, what does it 'use up'?
Does it use up the amps?
I thought a Watt = Volt x Amp. So if the 12v rail supplies a constant 12v, wouldn't the consumption be in the amps?
To me... it just seems like watts is a really poor way to measure the power consumption of computer components.