Rofl, EZcool? I don't think I have ever heard of that one.. 2x20amp 12v rails are extremely weak for a 700watt PSU, which means that most of the power is emphasised on the 5v rail (nearly unused in newer pc's). Buy a quality power supply. That is the #1 problem when trying to run high power cards. It could be possible that in your games when you add AA that it puts more load on the card, when your card isnt being taken full advantage of due to you running a stock clocked e6600. Also, try reinstalling and cleaning your drivers to rule that out.