Some questions about voltages on different motherboards


New Member
First of all, thank you for this great tool, it's very usefull
Second, sorry for my english, i'm from Argentina.

Now.. I got some screenshots of differents motherboards, and i got some questions.


After reading a while i know that:

VID: Not the real voltage, but just the "theorical" voltage that the CPU needs in that specific moment (if i'm wrong, please tell me)
VCCIN: CPU Input voltage
VCOREREFIN: Cpu input voltage also
Vcore0, 1, 2, 3: REAL voltage on the cores

I think that it's all right, because all the numers fits.

BUT, in this screenshot:

VID: seems to be the same
VCCIN: Seems to be the same
VCOREREFIN: its on 0v.. max: 2.0v .. what that means?
Vcore0, 1, 2, 3: I dont even find these ones! that means that VID is the REAL Vcore, or its some of the Vin5, 6, etc..?

Last screenshot:

In this one:

VID: Seems to be the same
VCCIN: Seems to be the same
VCOREREFIN: This time, seems to be corelated to Vcore0, 1.. etc
Vcore0, 1, 2, 3: Seems to show a real value (like the first screenshot), but its showing a max value of 2.0v!! Totally insane
i know the voltage changes because of the C states (all these pictures are from a motherboars with the C states activated), but 2.0 its totally imposible.
That means Its just a bad reading, and i have no way to know the real values?

Thank you very much, i hope my english don't disturbed you, and i sorry for large screenshots, i cant find a way to use Spoilers
Sorry, but on some of those screenshots I can't properly see the values.
But you're right with your assumptions. The problem is however that Haswell-based CPUs feature a Fully Integrated Voltage Regulator (FIVR), so the entire VR logic is integrated in the CPU. On previous generations it was easier for mainboard manufacturers to measure Vcore since it was a signal routed from VR to CPU. Now it's inside the CPU and only some mainboard vendors claim they can measure the Vcore (via a voltage observation pin from CPU).
Thus the voltages you see (I assume you posted screenshots from different mainboards) depend on particular design and are different in capabilities between vendors. Some of values seen might not be valid but this depends on particular model.