You're welcome @lemonsplash and thank you too! If you need other BIOS mod jump in and ask

I flashed the bios with this guide. (Renamed to bios.rom)
https://rog.asus.com/forum/showthread.ph...l-AMD-roll-back

Worked flawlessly. Disabled HPET. Found that Intel Speed Shift was also unlocked and enabled it for sure. HWInfo64 says, that its now active in Autonomous mode. Can't hurt.

Hi, I was wondering if this modded bios will work on my ASUS z170-p? Or since you're very knowledgeable and helpful if it would be possible to mod the z170-p bios for HPET support?

Edit: I just noticed one of the bios listed on the z170-p page is version 3805. Does this mean the bios versions you modded and uploaded for the other people in this thread will work for my board also?

@Tihkal - you would need BIOS mod for your board, this BIOS is for a different model. I can do a mod for your board, please give me some time and I'll get you a BIOS made.

Thanks a lot @Lost_N_BIOS you're putting a lot of time and effort into custom bios for us, really appreciate it!

You're welcome @Tihkal - I enjoy modifying BIOS so it's my pleasure to help
http://s000.tinyupload.com/index.php?fil...548472967077632

High Precision Timer setting should now be visible for you at Advanced >> PCH Configuration (Original settings >> Default = disabled in fail safe mode / Enabled at Optimal Defaults mode)
Also enabled SPD Write Disable setting for you or anyone else using this BIOS later, same page (Same original defaults as above False at failsafe / True at optimal)

MCE can be enabled on AI Tweaker page in this BIOS if you want too (Multi-Core Enhancement, only works for certain CPU's, with certain microcode and ME, for Non-Z/Non-K Overclock type things)
I did not enable by default, in case it's already visible to you by default.

Mod BIOS can only be flashed using certain methods, USB Flashback, or multiple other non-standard methods (Can't use EZ Flash in BIOS).
[Guide] How to flash a modded AMI UEFI BIOS
See also - "Third Spoiler Only" for flashing info - https://linustechtips.com/main/topic/592...r-motherboards/

Do not rename file if using USB Flashback, and do not use this .CAP BIOS with FPT

If you have to follow my guide to FPT flash (no compatible USB for flashback, or no flashback on this model), here is your BIOS Lock variable so you can start guide at step #6 >> 0x8A7
[GUIDE] Grub Fix Intel FPT Error 368 - BIOS Lock Asus/Other Mod BIOS Flash

And, if you do use that method ^^ Please send me your backup BIOS region to modify instead, per the guides warning
And so I can send you correct .BIN file to use with FPT

Hello! I am trying to disable HPET on my bios on Asrock Fatalt1ty b450 Gaming K4 p1.80 latest bios update. It is auto Enabled and i want it disabled. Can you help me out mate? :)!

@pPAKKE - already helping you in your own thread, no need for multiple posts about this. I'm sure you probably wrote this before making your own thread, so ...

Hello, I am finding myself in need of a visible HPET toggle within the Z170-A UEFI/BIOS. I see there is already an image on this forum that does this, but for the ASUS Z170 Pro Gaming, as well as the Z170-P. Can I flash one of those images, or will it brick my board? (I'm assuming this is the most likely outcome.) If it will brick my board, is it at all possible to get a similar image, but for the Z170-A? Thanks in advance.

@shrikkyj - moved your post to the other thread, and adding all models to the title so others can find easier in the future

Z170-A - HPET + SPD Write enabled (Read info at post #36 above ^^)
http://s000.tinyupload.com/index.php?fil...996337137614205

Thank you so much, will let you know how it goes.

I think you gave me the wrong file, the unmodified 3802 CAP. Comparing the raw hex data of the unmodified 3802 CAP and your patched version shows they are identical. Please correct me if I am misunderstanding. Currently I am flashing the file with ASUS AI Suite 3, and it definitely flashed, as my BIOS updated from 2202 to 3802. But when I go to Advanced > PCH Configuration, the HPET option is not present. I also loaded optimized defaults, and nothing changed.

@shrikkyj - I downloaded the file linked above and it's correct, it's the BIOS I modified for you and cannot match identically via hex to the stock BIOS (Must be at least 2 bytes changed, if not more - I did not compare)
Reflash again using USB Flashback, maybe flashing via AI Suite is why no changes for you? You should see HPET option and SPD Write option (This one nearest bottom of page)

You made me curious on how much was changed by the two things I adjusted, so I went ahead and compared via hex, many changes, sounds like you have mixed up some files possibly? Please redownload and make sure you're only using the file I sent.

Difference algorithm compare

Simple comparison

Okay, thank you for checking. Is there USB Flashback on the Z170-A? I read that it isn't present on this board, despite it being mentioned as a feature. Apparently you need an add-on card to flashback. I may have mixed up the files, but I thought I re-downloaded both the unmodified and yours again to make sure I didn't. Next time I get a chance I will try again. Do you have any recommendations for other flashing techniques? Because the first I looked into was USB Flashback, which I at least thought my motherboard doesn't support. Then again, I didn't look into it too deeply. Next I tried the AFU tool from the AMI website, which gives me an error about a flash device or something to that effect. So then I got down to the AI Suite method (all this from the AMI flashing guide you previously posted) and tried that, and it is the only way that at least flashes so far. I have seen mention of an Intel FPT tool, perhaps this could work?

I am not sure if there is USB Flashback on that model, if not you'll have to flash via FPT or AI Suite method you mentioned, but redownload the file since you said you compared and it matched via hex to the stock one - that means you flashed stock BIOS previously via AI Suite instead of the mod BIOS.

Yes, FPT will work, but you have to do some other stuff first before you can use it. I'll help you do that later if needed, but try again AI Suite method using correct modified file.