Has this something to do with Vista System panel reporting wrong cpu speeds for high multipliers? In my case only some softwares (cpu-z, Real-Temp, TurboV, some Everest pages) report the right cpu frequency when I'm at 160x25. Most softwares report 3.84Ghz, as though the multi were 24. Turbo is off though, but I think the problem is with Vista reading the default cpu multi (24 for the 965EE) and multiplying it for the Bclk. This happens with any software I've tried except for the ones I've mentioned.

Cpu-z though reports 4Ghz as if it were a constant frequency, whereas Real-Temp reports many variations, with the multi covering all the range from 20 to 25.