Quote Originally Posted by indiana_74 View Post
No i use a voltmeter to check the wattage of the complete system and it shows me that there is NO difference between 1.1V and 1.25V Vcore when the system is running at 100%

That is not possible, there must be a difference!

The CPU does not change the Vcore
OK, let's take a look at this.
note. these calculations are by no means accurate. i have assumed the current a CPU draws is constant, etc. But at least it provides an indication
At stock, the procecessor's TDP is 68W. Stock is 1.1V, so 68/1.1=6.18A. Now if you feed it and extra 0.15V, that mean 6.18*0.15=0.93 extra watts, a lot of which isnt actually being used (TDP is a theoretical maximum), and therefore the difference is not large enough to show up when measuring power, especially not of the whole system.