[GUIDE] Fixing HT for Coffee Lake CPUs on Skylake and Kaby Lake motherboards (Z170, Z270)

Valera_Master · October 2, 2018, 1:48am

#98 #99 #100
[SOLVED] Coffee-lake Cpus on Sky/Kaby-Lake chipsets (7)

Please help me

s.napi · October 2, 2018, 7:22am

Do the step 2 of this guide - you need to modify acpi tables.

dsanke · October 27, 2018, 5:38pm

tested with 9900k with 8700 compatible bios, the same phenomenon as these msi or asus with 8700 , 79→96→B2 loop.
i can confirm bios which do not support kaby lake have no thread limit . but for these bios not only pcie need to be fixed , also voltage/sensor/power limit need to be fixed too . i can only fix pcie following what movax had done.
i tried remove tcg/nvme dxe and smm but still stuck at logo.

anon53639373 · November 7, 2018, 11:46am

@dsanke can confirm that. tried 9900k on maximus 8 impact board. I got no screen on igpu but dedicated gpu gives me the bios splash screen. postcode was something like 99-32-35 in a loop.

dsanke · November 9, 2018, 2:48am

@oldirdey try modify on 2201 version and see if 9900k work.

diderius6 · November 17, 2018, 8:30pm

Hi,
does anybody know, how to fix the ACPI in Bios,
so that not the famous BSOD 0xA5 “The bios in this system is not fully ACPI compliant.” during install of XP
happens?
I know, that you can chose with F5 “Standard PC”,
but Hyperthreading is gone without acpi.
I installed XP on Samsung nvme pro 970 as boot device
on an Asrock fatal1ty z370 gaming k6 motherboard with 9900k cpu.
All works, only acpi not,
have a nice day
Dietmar

https://msfn.org/board/topic/177563-newe…comment-1156373

Mov_AX_0xDEAD · November 18, 2018, 12:51am

Windows XP SP3 32bit and modern PC parts

ultimahwhat · December 13, 2018, 6:12am

@s.napi you mentioned in the OP that you used “common sense” values to modify the ACPI tables. Given that, would you say that different motherboards will treat the (un-officially supported) CPUs differently in terms of auto voltages for various frequencies? I ask because before I modified the ACPI tables, I was getting BSODs everywhere, unable to get into Windows. After modifying ACPI tables, I was able to boot into Windows, perform a clean install, and do routine tasks with occasional BSODs. I decided to try manually setting the voltage to provide more than was automatically being supplied, and I’m holding stable so far 1 hr into a Prime95 stress test with AVX enabled.

You’ve done great work already, but I’m wondering if it would be worthwhile to try to gather data from everyone who has successfully gotten CFL cpu to run in a sub-Z370 board to see if different ACPI profiles would be appropriate? It could start with did the “standard” modified values work for you, y/n? And go from there. For reference, I used the automatic BIOS editor, exe #7 (which I assume is based on your work in the OP), and I had the issues as stated above on an Asrock Z170 gaming itx/ac and a 9600K.

s.napi · December 13, 2018, 7:20pm

Every ACPI change I made/suggest was only to support another 8 processor threads. The result is one (only) fixed/correct ACPI code, can’t be more than one. I suggest to modify last/more recent version of BIOSes. Are you using option, in BIOS setup, SVID on/enabled?

ultimahwhat · December 13, 2018, 10:23pm

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
Z170 BIOS knows only 4 cores CPUs so it sets only bits 0…31 (eax). Bits 32…63 (edx) will be 0 (or previous values read from CPU). We can move to edx the same value that is being moved to eax ([ebp-00000010]):
0000f1ef 8b55f0           mov         edx, [ebp-00000010]
0000f1f2 8b45f0           mov         eax, [ebp-00000010]
0000f1f5 b9ad010000       mov         ecx, 0x1ad
0000f1fa 0f30             wrmsr
If we set "Sync All Cores", ratio 50 in BIOS setup, then in eax is four bytes with value 50, this is copied also into edx and on 6 (8) core CPU we are setting ratio 50 for 5,6 (7,8) active cores.

@s.napi Hi just want to confirm this is the ONLY spot in the module that needs editing? I’m searching through the disassembled HEX file, and there are several instances of "wrmsr" but only one with the specific strings "8b55f4", "8b45f0", "b9ad010000." I’m guessing these are the strings that are conserved across motherboard manufacturers. So if I read your post correctly, I just need to edit the string at 8b55f4 to match the value at 8b45f0, correct? Thank you!

Edit: I got help from @svarmod with a utility to get my BIOS patched for all core sync. I was having trouble finding the 0x1ad string in my BIOS.

Pill_Monster · December 14, 2018, 1:30am

Hit F7 during setup.

https://support.microsoft.com/en-nz/help…ling-windows-xp

ultimahwhat · December 14, 2018, 4:49am

I don’t recall an SVID specific option in BIOS (have been working in it for last 3 years), but I’ll take a look next time I’m in there. Is there anything else it can be called?

Edit: nevermind, I got all core sync working with some help.

Vaxter · December 17, 2018, 8:26pm

SETUP

MB: ASUS MAXIMUS VIII RANGER
CPUs: pentium G4400
i5 9600k for mod picture of pin mod i am going to try when i get the bios installed
http://i66.tinypic.com/f3e5n4.jpg

So i am on the side i have cpu and motherboard i used AllinOne the puput file was .bin, as you sayd to mod bios used 3802 but method to flash ASUS bios Flashback don´t work for me and i also tryed use USB with AFUDOS and i get all this

the motherboard was originally with BIOS 3802 i mod same version and downgraded the motherboard BIOS to 3007

afudos 4.40 - Error Bios is write-protected

afudos 3.06.01 - Error using the wrong AFU version, Please use Aptio 5 AFU

afudos 5x -

Reading flash … done
- ME Data Size checking . ok
Secure Flash enabled, recalculate ROM size with signature… Enable.
- FFS checksums … OK
22 - Error: Problem allocating memory

Lost_N_BIOS · December 18, 2018, 6:19am

@Vaxter - I replied to you on how to get around this issue here
Fixing PCI-Express for Coffee Lake CPUs on Sky/Kaby Lake non-Asrock(and some new Asrock) motherboards (9)

easlan · February 4, 2019, 8:44pm

hello,

anyone have working i7 bios for ROG STRIX Z270F please attach it , i tried to patch but it fails and bios are being recovered and reverted back to previous one

Thanks

dsanke · February 14, 2019, 3:28pm

Anyone success boot 16 threads?
Without porting Z370 BIOS Region, I can only get 16 threads run on Gigabyte and ASRock motherboards. All others stuck at Logo.
ASUS M8I debug light show different code
with 8700K 96 B2 99 B4 99 A2 A9
with 9900K 96 B2 99 and stuck here.
I tried remove 0639408B-19A6-4B5D-BAFB-12A2F5114032 Acoustic but it doesn’t help. When I remove that module , it even can not boot with 8700k.

cooroxd · March 15, 2019, 11:54am

I have the same motherboard (asus z270m-plus prime) as you. Did you manage to get 8700 working and is it working with no issues and all threads enabled?

Doomslayer · April 18, 2019, 3:37pm

Hi @dsanke ,
do you have any tutorial how to porting z370 bios region? I want to try with my h270 board, currently my h270 succesfully runs i9 9900k with HT disabled (8 thread), but when HT is enabled it will stuck at boot logo (tried with all bios version, same result)
I want to run it with 16 thread, porting Z370 bios region might be the only way.

here is my modded bios, works well with i5 8400, i5 9400f, but Not i9 9900k(stuck at boot logo): https://www.dropbox.com/s/pwjhmvd7hf6h88…modded.bin?dl=0

Thank You

davidm71 · May 22, 2019, 5:43am

Hi,

Any of you guys notice having low vid values? My Asus Z270 WS + 9700k build is reporting low voltages per core. The Vcore sensor in HWinfo and Cpu-Z seem correct but the vid volts per core are low like .9-1.008 volts under load. Is this normal?

Thanks

Rez · July 20, 2019, 4:43am

@easlan
I am using Z270F as well. Got the ported bios from @svarmod and managed to flash it using AFUDOS.

See this for modded bios:

And this for the method I use:
Flash-any-most-Asus-motherboard-Bios-in-DOS-with-USB-tutorial-Intel-AMD-roll-back

Hope it helps