hello, im new to macs and recently just purchased a brand new 15" mbp 2.66ghz model. i've been running defualt settings since i got the computer but recently just switched to using the 9600gt card (performance mode) and notice that apps open and close alot faster, and web pages render faster as well. my question is, are there any negatives to running the 9600gt all the time aside from more battery consumption? will it run hotter or cause anything to fail sooner? thanks.