So it isn't all about watts

[erwin1978]

With todays PCs what's the normal current draw for each of the rails in a power supply? Let's say my specs is as follows:

A64
1 gig ram
1 harddrive
geforce 6800

I've seen 500 watt power supplies with 10 A on the 12 volt and yet on 300 watt power supply it's 15 A. I certainly don't want to get a $100 power supply if it can't provide the current.

 

[DonNagual]

Here is an excellent thread on PSUs. I'd say for the system you are looking at you're going to want about 24a on the 12v rail. And better yet, get a dual 12v rail (with 12-18amps on each).

http://www.hardforum.com/showthread.php?t=792566