3.1Ghz or 3Ghz both are awesome OC man...nice!!!! Well, u shud hav got the DDR3 256mb MErcury, it cost's lesser ~ 3k actually and the DDR3 performs better(256MBDDR3 vs 1024MBDDR2, winner, 256MBDDR3) Never the less, some games require more memory, can come to help. Actually such high amounts of memory helps when u r gaming at resolutions like 1920x1200 or higher, or not much benefit. But never the less, VERY NICE!!!!!!