I am trying to understand offset voltage overclock. Currently I have a stable manual voltage OC of 4.7ghz @ 1.260v.
However I have tried so many different ways to get an offset OC working it's starting to get really frustrating. Basically I first set my multiplier to 47x, set voltage mode to offset and left it on auto and changed LLC to 75% on Sabertooth Z77. What I was expecting to see with the auto setting was a lower voltage at idle than under load. However what I ended up seeing was the voltage significantly lowering when running P95 than when idling.
idle Volt: 1.384v
P95 Volt: 1.304v
Anyway I am fully aware this isn't how you are meant to do offset overclocking, I just wanted to test with auto settings. So anyway from what I've gathered in guides I need to find out my processors stock voltage for the given multiplier.
So for me at 47x the stock voltage was 1.180v. I can boot into windows and browse with this voltage but p95 causes BSOD, so I assume this is the voltage my CPU can run at when idling.
Then, from what I've gathered, you are meant to take your manual OC voltage under load, which in my case was 1.275v.
Then you are meant to take your load voltage away from the stock voltage leaving you with the offset value.
so for me 1.275v - 1.180v = 0.095v
So I entered my BIOS and put a positive 0.095v offset in. Booted up and it worked fine however the voltage reading in CPU-Z was showing slightly higher (at idle) than it was before on manual setting (at idle).
I thought the point of this offset voltage thing was to reduce idle voltage but allow the voltage to increase to the needed voltage when the CPU calls for it.
Basically I was expecting to see with my +0.095v offset OC:
idle voltage = 1.180v and increasing up to 1.275v as CPU usage increases...
I really want to understand where I'm going wrong and how to achieve offset OC :-(
I want to understand why auto offset actually reduces voltage under load??