Set the LLC to high or ultra. The higher you set it the less it drops mine on extreme actually goes up by.02v when loaded
Maybe you can make it a little more clear since that goes up by 0.02 is from what is set in bios or from what HWMonitor or similar is reading before going under a load?
My CHV with only FX type processors, if I get to the "exact" voltage that is needed to sustain a Big load and get that set in bios, Idle will not be that voltage but when the FULL load comes on, my CHV will jump over that bios set voltage as soon as the load comes on and then will drop back almost instantly and hold my bios set voltage 99% of the time that the load is present.
The last or highest settings for LLC in my CHV are High, Ultra High and Extreme. In order for me to see what I describe above I have to use Ultra-High up to about 5.2Ghz and after that it takes Extreme in order to maintain that "set" bios voltage under a Big Load like P95 Blend.
The reason I am trying to be so specific is that I understand the Sabertooth 990FX does not operate exactly as the CHV does. Close but not exactly. But the Sabertooth 990FX has CPU LLC that works much better than the cheaper Asus boards and almost without exception, better than the majority of the Giga UD3 series of board.
It takes a little work to find that exact voltage and the CPU_LLC that when working in conjunction under a Big Load, the voltage will not be overshooting like crazy and adding more heat. Once I know that Voltage and LLC, I can leave the LLC at that setting from then on and adjust only the Vcore to run just about any speed (<5.2Ghz) in daily use and do so knowing that I will be stable with just an adjustment of Vcore for the speed I run. I have charted all the Vcore voltages by speed and have a chart of same.
I use HWMonitor Min/Max voltages to zero in the voltage I will have to use as the bios set voltage. The actual result is similar to that Offset Vcore that we tried on the Asus better boards that did not work exactly as expected. But getting the Bios set Vcore and the CPU LLC setting dialed in like I am trying to show, will give a lesser voltage not under load which is what the Offset Vcore was to allow.
There are just so many things the 'really' good boards allow that are just not present in the cheap boards. Some of this stuff was not apparent at first. I did not see what I am writing about until after the Vcore Offset did not work like I thought it should, but what I am trying to describe does just about the same or at least the result is very very similar.
Hope it makes a little sense. These things you never hear voiced. It takes effort to get there and I had to learn my own setup and then trial and error test to get the better working condition. When we get to this point, then we are overclocking. Push the limits and do so as gentley as we can. Dont get me wrong there is time for a hammer, but my thrill is in tweaking the Pee out of it and getting the most for the least. That least is usually voltage. Which means less heat. Our huge enemy.
RGone...