I was able to flash the BIOS v. 4101 (but it was only possible after I switched from UEFI to compatibility mode in the BIOS. I changed this again after flashing. Am I doing something wrong here?). I used the following driver: v3_payne_50_20.ffs. My question is here: Does this mean that I can undervolt at vcore offset max 50 mvolt? So for example if I enter a higher value than 50mvolt offset, it has no effect? Tech Yes manages that over 90mvolt, would that be realistic?
Furthermore, I can't find the LLD setting, can you tell me where it is?

Other BIOS settings:
-All cores set to 36 (also tried 33 and 30, 33 seems to work best).
-C-States disabled
-undervolting 50mvolt
-CPU Spread Spectrum disabled
-BCLK: 102 (with this setting the CPU snaps higher, BCLK of 100: multiplier 24-26, BCLK of 102: multiplier 27-31)
-RAM on Auto

Mainboard: ASUS x99 Deluxe MK2

I am an X58/XEON enthusiast so far, never overclocked an x99. Man, there are way too many settings, insane...... I don't understand all of this parameters correctly (smile)

The result was that the CPU (Xeon E5-2699 v3) does not log in cleanly at the turbo frequency (3.6ghz). Benchmarks: Cinebench r15 the cores run at 3.0 Ghz, in Cinebench r23 the cores are clocked down very quickly to multiplier 26-29 (Probably this have to do about the higher stressing of the components in r23, can be a Temp Problem???). In the benchmark in AIDA64, it does well with high multipliers for the first few seconds, but even then they are clocked down. At this point the CPU temperatures are at about 74 degrees. Here it shouldn't be a temperature problem yet. After one minute, however, the temperatures already read 85 degrees, which is way too hot (even though the cores are never used that much in reality). I have currently a singletower Noctua CPU cooler, that seems to be too little, I could have thought myself that this is too close......my mistake! Therefore, I try the Noctua NH-D15 Dual Tower or Arctic Liquid freezer 2 280mm, they are both in stock.

I'm trying to learn all of this, but you buddys here are very skilled, genious BIOS work!!!