I could be wrong. But I think the LLC setting is based on your clock / power draw. If you are overclocked alot then it requires more LLC to keep stable under load. I may be wrong but I am sitting at 4.3ghz and LLC on normal has significant vdroop and instability but when I set to high (just one setting up) then it actually gives me vboost. I go from like 1.38v up to 1.40v and it is very stable and returns to normal after load. I have read quite a bit about this recently and it seems keeping it the most stable is important, vboost/vdroop doesnt matter much as long as its stable at whatever level it either droops or boosts to. If you have vboost like I do its recommended you keep your voltage setting under max, due to the possibilities of it forcing overvolting, but I have a feeling if I upped the core and voltage I may need higher LLC or it may become stable vdroop. I could be wrong but thats just my assumption. Heres some good info on LLC:
heres the most important pull from it:
Quite frankly I was shocked to see the effect that LLC setting has on actual voltages, especially at Ultra High and Extreme. I do understand that that every motherboard may implement LLC differently, and the Vdroop/Vboost changes may not be as incredible as I saw on my board. I can easily visualize someone trying to get the highest overclock possible, but ignoring the LLC setting (or worse setting it to extreme) and frying their CPU. I hope this thread illustrates my experience with LLC and persuades the reader that LLC should be used when overclocking, but must be used with care.
Personally I chose an LLC setting of High (50%) for my overclocking, because it resulted in no Vdroop, but didn't result in enormous Vboosts. I also took into account the small observed Vboost, and made sure to never bring my voltage to a level where the Vboost would touch the fast-death voltage of my CPU. I have what I consider to be a stable overclock with this motherboard and CPU at 4.5 GHz at a Vcore of 1.325V (stable for 24h of prime95 small FFTs). "