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

Please help me

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

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.

@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.

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

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

Zitat von diderius6 im Beitrag #126

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Hi,
does anybody know, how to fix the ACPI in Bios,

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@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.

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?

Zitat von s.napi im Beitrag #17

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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.

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Zitat von diderius6 im Beitrag #126

---

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

---

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.

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

@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)

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