Do you have SpeedStep enabled? If so, it may be the system managing the heat/speed of the CPU while it is idling. How are your temps running?
Yes , i do have EIST enabled, but this fluctuation is happening on idle. 0 to 1 % usage.
Shouldnt't it be using 1.275 on high cpu usage and 1.100 on idle ?
My idle temp for 3.6 is 38 C .