Originally Posted by RedBlueHue4
So if I gather correctly, raising VCCPLL voltage with not help with introducing a more stable system? my Vcore is at 1.32, 4.9Ghz, VCCPLL set to 1.060 but the system isn't quite stable. Since I have a lot more headroom in VCCPLL I figured it may help with stabilizing. Is this not the case & should I just lower this setting to the lowest voltage allowed for stability? I know there is headroom in Vcore as well, But I would like to use other voltages that I can to get her stable where she is at Vcore now, so I will have more headroom available for pushing 5.0 in hopes of more.
What you are doing to check stability? Personally i have cronic issues with p95 AVX, since 6700K i cant manage to beat it, but im a lazy man and i eventually rest when i can pass several hours of realbench.
My current 8700K is doing 5ghz under noctua dh-15 and 1,34v. I never had stability issues, apart from p95.
If i had to tell you, you would probably get a performance uplift if you could increase ram frequency, but since you use 32gb, it could be a bit pricey to get a 3400/3600 set of 32gb.
VCCPLL and PLL OC will not help you, at least with the kind of OC you are pursing. You probably need to increase vcore, you have still headroom, i would bet 1,35-,1,37 is safe as long as you can keep temps stable.
VCCSA (system agent) is related to BCLK & VCCIO is related to memory controller stability. Since you are running 2666 kits, you dont really need to change this, you are basically running memory as JEDEC specs.
RING is actually your CPU cache, and your cache frequency and voltage. Usually i keep RING around 4.5 - 4.6 ghz; its been tested extensively around here, and on skylake arch (the same that is base for kaby and coffee lake), performance gain is barely noticiable, while you will increase temps trying to match RING to CPU frequency/multiplier.
There is also some discussion around here, about how much temperature increase can require more voltage to bring a cpu to stability; having dellied all my recent non soldered cpus, i can say its much easier to reach a stable working voltage than doing it without. Plus, for 5ghz+ frequencies, unless you have some golden sample, its really hard to tame temps without delliding, intel TIM/Glue really cant transfer temperatures fast enough.