Quote Originally Posted by MACMAC View Post
Definitely test the 3845B, you will likely be able to do 4.2Ghz at 1.25V or less.
Got a 3845B259 tonight from Microcenter, it needs 1.37v for 4.2GHz and needs 1.39v VTT for 4GHz uncore. The 3849B018 I have does it at 1.34v with 1.34v VTT for 4GHz uncore, but, it acts weird with voltages. Only stable at 1.21v VTT or 1.34v VTT, anything else will blue screen. It is picky about core voltages too, they need to be within specific areas, too high or low and it'll have problems. Should have stuck with my C0, it'll do 4.3.