Hey, recently I have overclocked my Phenom II x4 955BE to 4.0ghz in bios, with a CM Vortex Cooler. My bus speed is 205 and multiplier is 19.5, and i have set the vcore just below 1.45 and it seems pretty stable, going no higher than 59C in prime95. However, the vcore fluctuates a little above what I have set in bios to around 1.52v when under load. Any ideas why, and is there a way to prevent this? Other relevant PC details are below. Cheers.