Overclocking skylake x

[pix-]

Recently I built a computer with 7820x and I gave overclock a try. I searched on google for plenty of tutorials and meanings and my results are pretty strange. 

 

First of all, I want to say that my overclock fail in realbench, but is solid in prime95 v26.6 and v28.x. The problem with this is that not all cores are staying in 100% usage while stressing, 2 or 3 of them are going lower and this causes my temperature never goes above 85 celsius and I am worried that I don’t really have a stable overclock. 

All the tests were madr with Blend option in prime95 or custom with: 1344 - 1344 or 1344 - 4096. On small ftt the temperature is going really close to 100 in a pretty short time.

My cpu is not delidded

 

My results are like this:

4.8 ghz with negative offset of 0.010 where my voltage during tests in hwinfo is 1.217 for most cores.

mesh clock is currently 29 with 1.05v

avx/512 are -4, so i run them on 4.4

Also I am using LLC level 1

 

When I tried 4.7 with the same offset realbench did not crash and finished the 15 minutes test with max temp of 80. 

But the same, my clocks does not stay in 100% the whole process.

 

Do you guys have some recomandations for anything ? 

 

Sorry for my bad english

[DogKnight]

Without doing anything other than changing the CPU multiplier (no voltage tweaking), I managed to get all 8 cores running at 4.6ghz stable. 4.7ghz worked most of the time but wasn't completely stable. Since changing to 4.6ghz, not a single crash. 

I am using a Corsair H115i cooler and during light loads it sits around 29 degrees average.