Thank you very much for s.napi !

Setting turbo ratio is done via writing to model specific register (wrmsr 1ad). Intel specification:




Original Asus code (probably manufacturer specific):

0000f1ef  8b55f4          mov         edx, [ebp-0000000c]
0000f1f2  8b45f0          mov         eax, [ebp-00000010]
0000f1f5  b9ad010000      mov         ecx, 0x1ad
0000f1fa  0f30            wrmsr

0000f1ef 8b55f0           mov         edx, [ebp-00000010]
0000f1f2 8b45f0           mov         eax, [ebp-00000010]
0000f1f5 b9ad010000       mov         ecx, 0x1ad
0000f1fa 0f30             wrmsr

Thanks to @s.napi again and again , I finally got sync all core ratio work on BIOSTAR motherboard and MSI laptop.

I succeeded using your guide @s.napi and modded the coffeelake bios provided by mtothaj. Still need to test the coffee lake cpu but I think it will work like the celeron I am using now for testing the bios.

But how did you get the .raw file, that you mentioned in Point 2.1 / 2.2 of your Guide, extracted? I was not able to extract them in that specific format so I used your attached files for compiling them in Point 2.4 of your Guide.

Use uefitool for extracting. If you have M8I board, and already compatible ME region flashed, you can use already modded bios from post #11.

I used uefitool but I got another file ending and not .raw like you did. But it was no problem, I used your attached modules from zip file and compiled them. I even changed the one bit from F0 to F4 using hex editor for syncing all cores.



So everything is fine. Thank you very much for this guide. How did you figure out the difference between 4 and 6/8 core in pei module and acpi table? did you read all the intel related documents or did you compare z370 bios with z170 ones?

@oldirdey

Hi, sorry for bothering you. Could you suggest to me a valid disassembler like the one in your attached image on your previous post please ?

@Sylar76 Hey, no problem asking about it. You will laugh, but I used an online disassembler for comparing. https://defuse.ca/online-x86-assembler.htm

@dsanke
About uncore ratios. It looks like it is expected for cache ratio to have offset -3 from core ratio. If I set cache max ratio at 48, core at 48 I only get cache ratio of 45. If I set core at 45 I get cache 42. I must set higher cache min ratio to come closer to core ratio - if cache min ratio is set to 47, core to 48 then I get cache ratio of 47 all time (won't downclock).

@Sylar76 - Hopper is OK free disassembler, and then there is IDA but it costs unless you know where to look.

The guide was meant for advanced users. If you don't know how to use a disassembler, there is no need for using it. It looks like the code is similar among vendors (ASUS, MSI, GIGABYTE) - the step 1 can be automated. I updated step 1 with info. Follow the steps on your risk - make sure you know (and there is a way) how to recover when something goes wrong (flashing not working BIOS).

@s.napi
I use rw-everything to check msr 0x620h .
The cache ratio can only reach 28x (0x1c) .
Even though I set it to 0x1f or higher , it still got 28x .
But when I set it to 0x1b or lower , it works.

I have the same observations - I can set lower but not higher (than what is set in BIOS setup) ratios in Windows (via writing to MSR). Neither for cache nor for core. The Intel XTU utility can set higher core ratios but not cache. Try setting cache min ratio in BIOS setup, if you have this option. The Z370 BIOSes have the option for locking cache ratio to core ratio, I think.

@s.napi
When I use Z370 port BIOS , the cache ratio default set to max all core turbo . For my QN8J is 31x .
The Z370 BIOS doesn't have more option than B150 BIOS , it just let these options work.

@s.napi I tried to change Core and Cache Ratio with XTU to higher values then set in bios. It works without problem. Changed Core from 47 to 48 and cache from 44 to 45. But I am using Win 7, maybe there is a difference to Win 8.