I can't understand this, though it may be the CoolnQuiet feature meant for AMD chips, but my Idle temps after overclocking to 4.2Ghz is lingering around 64-68c, yet once load is applied, it drops to an easy 37c, any idea what this is?
Just a though, but perhaps the fans kick up and cool it? Or possibly you have a program like BOINC that uses the cpu quite intensively until another process needs it, and the second process is less intensive? Another possibility is that the chip throttles itself (coolnquiet), due to instability and load.