Wattage isn't my main concern, but mostly the amps on the 12V line. I'm planning on getting a 7600 GT that comes overclocked out of the box from BFG, and I want to make sure that I don't really screw myself by not getting enough ampage to the graphics card.

I currently have an X800 GTO plugged into the standard ship dell power supply, and the damn amp rating on the 12V line wasn't hardly enough (I haven't started reading up on the poor forgotten and neglected power supply 'till lately). Of course, I had a fan malfunction and a few black screens that I attribute to not enough power.

If anything, I'd love a 400 watt power supply that chugs at least 20 amps to the 12V line. Unfortunately, I'm having a hard time finding one on my limited budget.

What I'd like to know is if there is a huge difference between 18 amps and 20 amps... particularly a hardware frying difference. If that's the case, I might end up having to plug out more money on the power supply and waiting to get the card.