@reactive - Yes, but what BIOS are you using now? I expected you'd see them all already, but yes, we can make/force visible. I will edit the HT Hard disable BIOS for you in that manner now, give me about 5 minutes
* Edit - Ohh no!! Sorry, we can't, only All, 1, 2, 3 options are there Someone with MUCH better assembly skills would need to rebuild/rebase the entire setup module to add more. Sorry, I assume it would be there just suppressed.
So, I guess you are limited to CPU with 4C/8T on this system, if HT will work with 8T

@Lost_N_BIOS : I am using your hard disable version.

Don´t hurry, here is morning and i am at work right now. the next time i have access to my pc is tonight in approx 11h.

But thanks in advance

@reactive - OK, see my edit above, not good news Sorry

@Lost_N_BIOS : ok, bad news.

mmmhhh, do you have a disassembled version? or could you send me what you have, that i could have a view on this? At some point there must be a "list" containing that strings that has to be extended. In normal programming cases, code should get the selected index of a dropdown menu. So if that dropdown menu is filled with an extended list of elements, everything else should be fine, except some itchy programmer of that bios checks the maximum number of elements allowed.

I am just looking at the IFR output from setup module, I assume you have this, correct? I tried changing values or 1-3 for example to next and previous characters, it's other settings instead of hidden/missing ones for this particular setting.
Someone would have to totally recreate the setup module, then recompile the entire BIOS due to NVRAM changes would then be required, AMITSE changes, AMITSE-SetupData etc. It's no where near as easy as you are thinking.
Now, you may be able to swap in entire menu from H370 for example, that too would require NVRAM swap/Edit/Re-compile xALL, Setup, AMITSE+AMITSES/SD swap, much easier to just swap entire BIOS region as test, then change model strings if it works.

@Lost_N_BIOS I have been looking for solutions to this issue with Asus H270 and 12/16 threads and someone that did patch an Asus H270 BIOS to make HT work with 12T had other issues such as no USB working before entering the OS - they didn't say how they modified the BIOS.

As Reactive said, on the Asus ROG Forum someone called spartan_hoplite posted some screeen shots (here and here) of a 9900K running with 16 threads on the G20CI using BIOS 1402 - maybe try to contact spartan_hoplite to ask how they got it to work and for a copy of the modified BIOS?

Although the 9900K would be severly limited by the motherboard VRM and the 180W power brick it could be made to work with some current limiting (IccMax).

@Lost_N_BIOS : didn´t had a look at that module. Will do this soon.

@chinobino : I contacted spartan_hoplite 2 days ago but till now I have no answer.
Currently the main limiting factor is the VRM. As I said, ASUS did not populate one highside MOSFET on their 3phase VRM. So i will mount 3 MosFETs on each highside resulting in less temperatures on that highsideFETs because 2 will be in parallel resulting in half of the Rdson-resistance. Lowside are 2 each phase. Then it should be possible to drive that CPU at 95W after modifing the powerlimits. Currently I only reach 60W (79A VRM), when overclocking VRM to 75W, I get VRM temperature alarm, and at some point it shuts down.
There is place for a 4th phase. this could be for integrated graphics, but this model does not have any hdmi, displayport connector anywhere. So they left it blank, i think. I will do some measurements.

@chinobino - Thanks for the info, hopefully that user will reply to @reactive and send him a mod BIOS and then we can go from there
reactive, can you check his last login date there from his profile? Just wondering if he's active user, or hasn't been there posting anything since last year

hello to all

my main is : biostar B250GT3 Ver. 6.x and i use i3 7100
i want move on i3 9100F
i did mod the last bios in official biostar website and this is my result

1 - is this ok ? or its faild?
2 - and can i use 6 & 7 gen beside 8 &9 gen ? or just 9 gen ?

thanks all and sorry for my English

@Lost_N_BIOS - I finally picked up a new chip and tested it and it works properly. This time I used the Ch341 v1.1.1.35 software version and the file you sent me with the name Stock.CTMAPadWkuCGbEFDFIT.bin. This time and after a couple of restarts, the computer started quite normally. I tested both LAN ports and like you said both works perfectly . Later I will test everything with the new processor and report the results.

I'm curious what the trick was to boot the 9900K on a H270 too and if it would work with booting a 9900K on a Z270 BIOS. I'm running a Z370 backported to my Z270 Apex IX which works great, but the Z270 BIOS has a feature that I'd really like to take advantage of; changing multiplier and vcore dependent on temperature. I've tried running the Z270 bios through the automated tools, swapping ME versions, enabling HAP bit, and few other things, but I get post code 00.

@MrCjxer - Drop BIOS on MC Extractor to see what microcodes are left in BIOS, that will tell you what all CPU's you can use, we can't tell from those images.

@Petoparac - Great to hear it bud! What new chip did you put on there, or same 1.8V Micron one? Great to hear both LAN working too

@ducegt - Trick is properly made Coffee Mod BIOS + Disable HT. For your concern about the settings, are those settings there in the mod BIOS you are using now, and just hidden from you, did you check or do you know how to check etc? If they are there and hidden, I can make visible for you
Enable HAP Bit is not ideal or needed for Coffee Mod BIOS. Please link me to your mod BIOS you are using now, and tell me what settings exactly by name you wanted from the Z370 BIOS, I will see if they are in the BIOS you're using now and just hidden from you.

hi again

its ok , right ?

@Lost_N_BIOS - The chip is a Winbond W25Q128 in DIP-package. I put in a new CPU (Intel Core i3 9100f) and everything started without a problem. Windows starts normally and everything works fine and without any problems. Also both LAN ports, wireless and Bluetooth work perfectly. Now I will try to run Cinebench and Aida stress test to see how CPU work.
Do I need to adjust something in the BIOS related to the CPU or motherboard?



Edit - Is it normal for the core voltage to go up to 1.424v?

@Lost_N_BIOS The H270 mentioned above had all 16 threads working so it must be something else or just a difference in H270 and Z270 chipsets. Thanks for the offer of help, but I've already read a lot the great guides you (and others) have wrote so I've already checked myself and the feature does not exist\is not hidden in the Z370 BIOS. It's called CPU Overclocking Temperature Control. The 100/200 series chips and CoffeeLake on OverclockersRU has a table showing Z270 and 8 core CPUs are not supported by modding.

I've looked everywhere and have found no explanation as to why 8 cores doesn't boot on a Z270 BIOS. There's little reason anyone else would want to do this, but this is such a great feature. It almost looks to me like the logic for this feature.... change temperature above X degrees...change vcore above X degrees... etc... exists entirely in the BIOS setup file and perhaps if the offset values, formids, etc were adjusted, the functionality could be added to any Apito V. I understand it might not be possible to add length to the setup though without creating a cascade of other changes that would be too great of a problem to fix.