If the value you see changing is in the AIDA64, you can be sure it is not real, if you see it in the utility of the motherboard manufacturer, it is not normal :nono:, although if it is for a few seconds you should not worry.
For all this, perhaps the only way to know if we are really being charged fairly is to go down to the Chinese store and buy a power meter for outlets. And that tells us the instant consumption at that outlet and we can use the rule of three.