i7-4720HQ unstable temps (i found the problem) need help in explaining

[SilentForever]

I recently bought an Asus ROG GL552JX just about a month old. One of things i notice is when the laptop is plugged in,the temps reading in hwmonitor,coretemp,realtemp all have unstable reading in load and idle state. It jumps around from like ex. 50-65 then and forth. When i turn off and use battery the temps stops jumping around. Realtemp shows sensor test when plugged in movement was 20-25 but with battery is around 2-3. Is the problem with the voltage? Some help please

 

[kanewolf]

My guess is the power profiles are different for AC vs battery. On AC power the profile probably is set for performance, on battery it is probably set to balanced or even low power.