wtf, dude, dont get a 6600, get a 4300. the e4300 is 117 bucks right now @ mwave.com AND u can oc to at least 2.9 ghz with a 99% success rate with almost any mobo. what mobo are u putting it in? you are likely to get 3.2ghz + in an asus or gigabyte mobo. Or- if you go the cheaper route, and pair it with a 50 $ cheapo mobo, then with the 9x multiplier, you still will get 2.7ghz with a 300mhz bus, which will be as fast as or faster than your oc'd opteron 165 @ 2.8ghz. i say 4300 for the price. sell your opty; cheap upgrade 🙂