The clock source are from CI and CB, but it is an experimental setting only. You can use the CB clock SRC. Adding the CI SRCs did not changed anything. CLKREQ SRC are the only settings, that bring back WIFI.

Yes the First Padding in the BIOS region is Windows license.

I had a temperature issue in BIOS, that made it necessary to change NCT. Of course, any software can identify the NCT because they scan the bus for chip IDs. But BIOS does not.

@reactive No temperature issue in BIOS, i didn't change NCT

Is this is the First Padding?

It seems disable CLKREQ SRC can't bring back WIFI, i have tried it before, i think the solution is your clock output configuration setting, but it can't boot in my machine because coffeelake need change SKU to Z370.

I had it, and inserting NCT6792D solved it. Disassembled NCT5579D and NCT6792D. It seems that there are different config data. The ASM code itself is identical. So i decided to swap it, and it worked for me. You can do what you want, if you do not need to change it, leave it.

Your BIOS region is different compared to mine, looks like G20CB. What PCB name is your bios showing, G20CB or G20CI-O?




if it is G20CB you will find ASUSBKB and VBIOS in the padding you see in the 4th row of BIOS region


Disabling CLKREQ only brings back WiFi if you set a "Detect Timeout" for rootport 7. Only with this combination WiFi comes online.

Btw. forgot to mention, that reboot and standby is working

Sorry, My English is not well, you mean the whole BIOS region is the first padding, right? I konw the GbE and FD44820B-F1AB-41C0-AE4E-0C55556EB9BD, but still don't know what is the first padding and where is the ASUSBKB,o(╥﹏╥)o can you tell me the GUID? Thank you!

Although I told you use MMtool to change NCT, but i have 2 G20CB and both no temperature issue if I didn't do this, it's interesting your machine must do this, you're right, do what you want to do.

Well, I made a BIOS according to your tutorial, but wireless is still old trouble, then I made a coffeelake BIOS using the files you supplied, still old trouble either... https://1drv.ms/u/s!AovXQPtIn_DybIROxB9Krn3U77A

The first thing we have to clear out is what BIOS region do you use? To me, it looks like G20CB because it has only one padding section named "PADDING"

G20ci BIOS region has 3 padding sections.

Padding section does not have any ID they are only named PADDING. Look on my UEFItool screenshot, it is there 3 times! And then look on your UEFItool screenshot, it is there ONE time only!

If it is G20CB Bios region, then it is clear, that you dont have any temp issue, because NCT6792 is already inside.

But had troubles too when trying a Coffeelake mod, so I discarded that.


The original G20CI BIOS supports Coffee Lake CPUs. Download it from ASUS an check it out.

OK, I've already understood the first padding, thank you.

Of course, I'm using CI's Bios region so it must be have no NCT6792, I even tried to use the complete CI BIOS, no thermal issue.

There is only microcode in ci BIOS, If no patch it can't supports Coffee Lake, Maybe your WiFi will be failed in reinstall system, good luck

Official 2202 bios for g20cb is out - https://www.asus.com/us/Tower-PCs/ROG-G20CB/HelpDesk_BIOS/

Now it's solved, then you got the link to new BIOS I wonder if they watched, and updated all this using some of the stuff changed here?

Even 2202 does not have any Kabylake support

Okay, built in my G20CB board in my G20AJ and instantly got two issues.

First: Windows did not boot -> boot device not found and 0xc000021a bluescreen, but listed in BIOS. Tried to reinstall Windows but NVMe M2 still not found. Disabled SATA port where the 3TB HDD is connected, then Windows boots. SATA port with BD/DVD drive works.


Second: WiFi with integrated Bluetooth did not work, but Bluetooth did. That´s because of x1 topology I set in BIOS. Setting to "unknown" solves that. Bluetooth is connected via USB, while WiFi uses PCIe. Fascinating!


Do someone have an idea with that SATA port?

@reactive - doing a similar mod for someone here to get Dell board running kaby lake, and can't remember on this thread or others like it, if latest microcode was OK to use, or if a certain older version was required. Let me know if you catch this soon, thanks!

The previous links are all expired,anyone can provide a new link for the bios?
Thanks in advance!

Zitat von Zax007 im Beitrag #136

---

I don't understand either, you can try this bios i'm using now BIOS

Use G20CB 2202 BIOS, replace G20CI 1402 BIOS region, put a Coffeelake PCIE patch, GOP to 1080, Vbios to 1059, ME 11.0.0.1202(G20CB Original), change SKU to z370 and keep the G20CB Original setting.

WIFI is use P7 and can work after sleep/Hibernate, this bios support 6/7/8th cpu, i change default SATA MODE to AHCI, if BOSD you need to change to RAID.


There is another problem if sleep long time, there is no screen for the display when wake up but the system is work.

---

Zitat von reactive im Beitrag #149

---

Here is the new BIOS image that is working: G20CI-to-G20CB-1402-BIOS-VBIOS1058-GOP1080-NCT-WiFi-uCode-clean.bin


What you have to do before flashing:
1. If not already done, read out your original G20CB BIOS with a flash programmer. Read it twice and compare it together, to be sure, that no errors happend. Store it at some secure place
2. Extract the GbE (for MAC address), FD44 region (Board serial number and ID) and the first padding (Windows License Key beginning with ASUSBKP) with UEFItool from your original BIOS, or use another method to extract your GbE MAC, Board serial number, and other IDs.
3. If you extracted these files, simply replace the regions of my BIOS image
4. Check it with FD44 editor
5. Flash it to your Flash
6. start your PC, enter BIOS and load optimized defaults.
7. Disable the powersaving option for the ASM USB3.1 controller in Windows Device Manager

Known issues:
1. OnBoard HDMI will not work (G20CI does not have onboard HDMI)
2. LEDs will not work (the LED controllers have another I²C Address and support not all new commands that G20CI have when using AEGIS3)

What has changed:
1. Complete BIOS region from G20CB replaced by G20CI (UEFITool)
2. ME updated to 11.8. with settings from G20CB (FIT)
3. Microcode insert for Kabylake (MMTool)
4. Replaced the NCT5579DPeiInit against NCT6792DPeiInit from G20CB (MMTool)
5. Disabled all CLKREQ SRC (FIT)
6. set "Detect Timeout" for Rootport7 to 500ms (BCP)
7. set Topology of rootport7 to x1 (BCP)

---