Hi there,
First of all, thanks to everyone for contribution and special thanks to Dufus and Stilt !
Now I got my E5-2686v3 at constant ratio of 28x (+500MHz) on allcore!
Here are version 0x27 & 0x39 microcodes for Haswell-Ex (0x306F2) in VMWare driver / Linux compatible format:
https://1drv.ms/u/s!Ag6oE4SOsCmDhFnET3uw9wHeV4EA
Rename the desired version to microcode.dat, and proceed as instructed by VMWare.
From where you got them ? And how to get other microcode versions in .dat format ? I would like to try others.
All Haswell-EP HCC SKUs should be unlocked up to 240W.
Are you sure ? Afaik only the max limit is 240W, but the Power Limit 1 is already forced at 120W. In my Taichi board Ive the ability to change them, but the new values are not taken. The only settings which I can successfully change are Thermal Design Current and the time for Long Duration of Power Limit 1.
240W is impossible to reach in my opinion, cause already Power Limit with 144W kicks in after 7,81ms (at least as HWinfo64 says)
What tools should i use, to programm MSR registers(maybe in small manual).
Yeah, a small manual on programming MSR would be cool.
By my own observation mc 27 and 39 perform the same. With both I get only an allcore ratio of 27x and have a CPU consumption of 105-106 W. CPUz gives me an increase from 20.000 points to ~24000. Quite well of course.
Using no microcode (0) in Windows gave me yet best performance. On constant 98W consumption I get constant ratio of 28x (two, three cores jump even to x29) and stable 25.000 points in CPUz.
Furthermore I tried to play with vcore offset. Strangely it has on microcode 0 on my Taichi-board a reversed effect. When I decrease my vcore in UEFI my actual voltage increases. But when I increase my offset by +0,100V as reversed it decreases, consumption jumps down to 94W with same CPUz result and less heat production (quite nice!).
Sadly increasing or decreasing Vcore offset by 0,100V didnt had any influence on my maximum ratio. Also setting my BCLK to 100 or 102 (my two m.2 nvmes dont tolerate more) didnt had any influence on my max ratio.
Checking HWinfo64 I can say for sure there is no throttling of thermal or current in effect. So does anyone found yet out why the CPU doesnt clock on a higher ratio ?
Does anyone know if its possible to trick the computer believing there is sitting another cpu inside than I have ? For example faking a 2696 or 2699 v3 cpu. Just as a thought.
My 2686v3 stayed at 2.9Mhz on all 18-core with the micro code 0x27. Is there any way to make 3.5Ghz in the 18-core?
How you managed to get ratio of 29x ? Did you used Dufus v3.efi ? You reprogrammed MSR registers ? Or did you played with vcore or whatever ? Thanks for any clarification!
Knowing what is different may give us a clue how to influence.
@TheSellHardTry setting Windows to use the High Precision Event Timer (HPET) instead by enabling it in BIOS if not already enabled and adding the BCDEdit option "useplatformclock yes".
What does these options do exactly ?