Hi, Here what I did: I set the "performance" governor for one of the cores and "ondemand" governor on an another core. Then I noticed that the cores have different frequencies. Based of the above observation on different processors, I have a couple of questions. 1) When I tried to frequency-scale in a core i7 processor, it allows me to set different governors for individual cores. As per to my understanding, the processor has 4 physical cores and 2 hardware threads per core. (totaling 8 cores altogether) This means, I should not be able to set different frequencies in two adjacent cores (say core 0 and core 1) as they both same hardware. My understanding is I should not be able to set the individual core frequencies as explained above. 2) When I played with Q6600 processor, I found that trough the governor, I can set the individual core-frequency. But as per to the literature, Intel does not provide a facility to frequency-scale in individual cores but the frequency in the entire processor. 3) What does the governor do? Does it set the frequency of the core directly ? 4) Is there any way that I can verify the actual frequency of a core other than the interface of the governor. Do you recommend to use MSR direly to change and measure the frequency of the system ? Sincerely, Pradeep M. Hettiarachchi