Okay thanks I finally found it in the Sensors section. But now I wonder, how exactly does Offset Mode work on Ivy Bridge then, what exactly is the baseline? o.o
VID is what the CPU is requesting at a particular multiplier. It is like a look up table built into the CPU for each Multiplier.
The Offset is applied to the VID, however you don't know Vdrop (Bios target Vcore difference to idle vcore at a given fixed Vcore) and Vdroop (Vcore drop from Idle to load at a given fixed Vcore), that causes 2 extra variables to play with, hence why your numbers don't add up just yet.
You can work out the Vdrop and Vdroop by setting a fixed Vcore in BIOS and checking the Vcore delta in the above scenarios.
For example:
4.5Ghz - VID = 1.2v
Vdrop = 0.02v
VDroop = 0.04v
Offset = 0.00v
Load Vcore = VID - vDrop - vDroop +/- vOffset = 1.14v
If Load Line Calibration is set to AUTO, then the behaviour of the offset voltage will be hard to predict since we do not know the compensation:
Load Vcore = VID - vDrop - vDroop -/+ vOffset + LLC Compensation
With ideal LLC Level set, LLC Compensation = vOffset +vDroop
Hence Load Vcore = VID +/- vOffset
Once you find a LLC level that is close to the vDrop + vOffset, then you are ready to twiddle with Offset and then be able to correlate it to the VID with more accuracy.
Knowing the Vdrop/Vdroop lets you overlock with a little but more understanding on how the voltages are being played with, and lets you set the optimal LLC setting.
With low Vcore such as yours, its better not to compensate the Vcore so much with LLC, since this can have a negative impact on the low multipliers, as the more LLC, the more likely you will run a negative Offset, causing lower multipliers to be starved of Vcore - and causing instability under close to idle loads. Generally you want to set LLC up so that the load vcore is close to idle, but always slightly lower than idle. That prevents the idle instability problem.
This problem is removed with adaptive Vcore in Skylake, as the offset is only applied to the OC's multipliers and not to the stock multipliers. It is why generally all chips before Skylake are more stable with fixed Vcore than offset (people setting LLC too high being partly the problem).
Intel always overvolt the chips, since it guarantees stability on all sorts of motherboard with varying Vdrop/Vdroop.
Each chip will have a unique voltage response and overclocking capability.