@Rubl: You are missing nothing, though some of theses steps can be more difficult than one expects, especially flashing without flasher ;-) Mimp has been modded several times, however. I think there are even readily modded UEFIs from pre-tools days and there should be an onboard SKTOCC-guide, allowing on to manipulate the mainboard instead of the CPU for the physical compatibility.

@emerakl: Using Z370 UEFI where possible is always better because these got optimizations for CFL. But it is much more difficult to do, especially as there are no general guides or tools as every board is different (unlike all coffee lakes which are pretty much the same). In your case you get the additional burden of the Xeon locks. While your CPU is physical identical to 9900K, IME is programmed to operate it only on a C-series board. I think CoffeeTime has an experimental remedy for this as well, but trouble shooting might get difficult because you are in fact trying to do two UEFI mods at the same time and failing either of these will end with no boot.

Hello,
I have asus z170 deluxe motherboard and I tried to mod bios for i3 9100f processor.
I used coffeetime 0.85a and try to add all microcode from advanced options. But when I try to patch ACPI tables I have lots of errors.
What can I do to resolve this errors?
Sorry for my bad English.

@Lost_N_BIOS Currently the ME firmware version is 11.8.50.3399, do I need to roll this back? I was under the impression that that will be done at the stage I flash the custom BIOS onto the board rather than now. I'm happy to purchase a CH341A + U Type Flat IC Extractor if that's the easiest and most reliable way to do this. My current CPU is an i3-6100, if you were willing to make a mod BIOS I'd be very appreciative and happy to donate you some money once I get it running.

@PCGH_Torsten When you say manipulate the mainboard instead of the processor, do you mean physically or through other means? If this can be done whilst physically altering as little as possible then that would be preferred, since there's less chance of me accidentally bricking something then.

Physical. Asus often routes the SKTOCC tracs to the surface somewhere on the board so one can short to ground from there instead of shorting on the CPU. Usually this involves soldering in a wire, though sometimes there is a grnd pad nearby and a bit of solder is sufficient (I don't know for Mimp). Technically the risk to damage somethin is definitley higher than the rather simple shorting on CPU, but extreme overclockers prefer modding the boards because than the can plug in any CPU at will and for all other it is a question of economics: If you brick the board, could you just buy a new Z370/Z390 an be done? Or would you be sitting there with a useless 9900K? On the other hand if you should manage to brick the 9900K, you are back to your old system and quit a bit poorer.

Hey guys, my i5 8600k CFL on the Asus Z170I is still running fine.
However the vcore voltage readings in BIOS and in windows tools totally differ. i.e. my BIOS shows 1.360v (manual set) and HWiNFO and other tools show only ~1.223v vcore.

Is this a known issue?

@Rubl - yes you need to downgrade, and you can't use ME FW 11.8 and you can't easily either (unless it's a Gigabyte board) So yes, yes get a flash programmer so you can do all this properly.
And get U Type Flat IC Extractor if BIOS is in socket, otherwise if soldered you need SOIC8 test clip with cable. And then yes, all will be flashed in at once with programmer.
I can make you BIOS, but please tell me your old CPU and new CPU (And it's SSPEC) all in one post, so I don't have to dig around. Also, remind me the motherboard model too, for same reason.
I try to steer clear of this thread, because it's so hard to keep track and or help anyone easily (Due to no one wants to spend $6 and wait to get a programmer setup), so apologies if I missed a reply previously

Zitat von Lost_N_BIOS im Beitrag #1011

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Due to no one wants to spend $6 and wait to get a programmer setup

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I have a problem to connect the two pins, what should I use to put the conductive paint on? An ear tip?

If you are using something like paint: A toothpick. Ear tips are much to thick.

@davidtheking - As mentioned above, but before you go at it, tape off all other pads, so you can blob on a mess and it wont matter
Also, some/many boards may already have this connected, so you can always try without it first too Not sure about Asus, but many Gigabyte I've tested it on it was already connected, even on cheap budget boards like B150 etc

Help, I already successful mod bios and now run coffelake cpu, I use afu /gan to flash mod bios but I lose serial number and Mac address, before I flash mod bios, I already make backup
Bios with afudos mybios.rom /O command , what should I do to get my serial number and maccdres sir ?

My motherboard msi b250

@Lost_N_BIOS: I have never heard of an Asus ignoring SKTOCC, neither Asrock. It is very common, though, on Asrock to not require this mod. (Do not know about Gigabyte or Biostar. Apparently they were not that popular during Sky/Kaby Lake times. I must admit that I never found a reason to recommend them either. (Except Gaming G1 in case of acute "too much money")

Hi. i am want to use a Asrock z370 pro4 with celeron g3900 sky lake cpu. i modified the latest oficial bios (v4.30) with the AIO tool, ME replacement to 11.7.xx procedure done, but fails in intel BMP GOP driver update (some like array error. used ctrl+alt+del to continue) (maybe z370 bios already got the update GOP version required??) but the same ended process. i checked with ubu tool the modified bios and cpu microcode has the "506E3" for skylake cpu. my question is do it work? the pin mod to the g3900 is the same for another coffee lake cpu or don't need pinmod? thanks!!

Hey Guys it boots without pinmod, but I get an a2 Error code when I use two memory Sticks. This is memory related, so I guess I should isolate the Pins regarding memory?
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I Just Set everything to Default in BIOS & it Just works without Any pinmods lol

If you get to post, you are always done with pinmods. However, RAM and voltages remain a big issue. After all you just forced the UEFI to work, but you did not implement all the auto optimizations a true CFL UEFI would have, so a lot of settings are running on a generic default and can cause stability issues.

Did you mod nothing at all or just no isolation? The latter is rarely needed on Asus, but this would be the first board to boot without SKTOCC-short.