nama: I realize that Ballistix memory can run at DDR2-1200 and that your memory has been proven to be able to run at that speed but it's still a good idea to reduce the stress on your memory when going for maximum CPU MHz. Try running your memory at 1:1 and see if that helps any. There's no guarantee that all Wolfdales are going to hit 4.5 GHz and be 100% stable.