I'm planning out a build and have decided on the GTX 460 w/ 1g memory. I like EVGA just because I've bought a couple of their cards and never had a problem. I went to their site and they have two of the 460s that are identical except one is super clocked to 763Mhz compared to the 675Mhz standard. Is the increase in Mhz something I could do myself once I got the card or is it worth paying the extra 10$? Thanks.