Bios Mods -The Best BIOS Update and Modification Source

Hello everyone,



this is my motherboard: https://msi.com/Motherboard/support/Z390-A-PRO

and I am currently using the latest BIOS version available on MSI website for my model Z390-A Pro, which is Version 7B98v1D with release date 2021-02-08.


I would like some help with unlocking the following 3 hidden features/settings on my MSI Z390-A Pro motherboard bios:


1. RFI Spread Spectrum Settings, the default on my BIOS is "enabled" at 1.5 % value, but hidden from user/invisible in BIOS, but I can see it when analyzing the BIOS file with UEFI tools etc,
this is a setting that in my BIOS can be set to 0.5%, 1%, 1.5% (default) , 2% , 3%, 4%, 5%, and maximum value is 6%, I can't see any 0% or fully disabled setting.
I would like to have this menu unlocked, and if that is not possible for some reason, I want to try 6% maximum value.


here is screenshot of the hidden RFI Spread Spectrum menu/options: (exported textfile via SCEWIN tool)




and here is screenshot of same hidden menu in BIOS file but with other tool (AMIBCP patched version for z390):

RFI Spread Spectrum settings from AMIBCP tool


2. PCIE Spread Spectrum Setting (default is enabled, this option is only on/off, hidden from user/invisible in BIOS but can also see it when analyzing BIOS file with UEFI tools)


here is screenshot of the hidden PCIE Spread Spectrum setting: (exported textfile via SCEWIN tool)





and here is screenshot of same hidden option in BIOS file but with patched AMIBCP tool:

PCI Spread Spectrum settings from AMIBCP tool



3. HPET High Precision Event Timer setting (default is enabled, but hidden from user/invisible in BIOS, can also see this when analyzing BIOS file with UEFI tools)


here is screenshot of hidden HPET setting: (exported textfile via SCEWIN tool)




and here is screenshot of same hidden option in BIOS file but with other tool:

HPET setting from AMIBCP tool


Best thing would be if possible, to unlock these menus/settings and save changes to a bios file that I can then put on USB and reflash like normal from inside my BIOS,
same method as if I was updating official bios version etc I mean..probably has to be identical filename and extension as original bios file ( E7B98IMS.1D0 in this case ) and hopefully there is no check from flash utility that will deny flash with this modifications..



PS. PCIE Spread Spectrum+HPET setting is simple on/off option so should be maybe easy, but RFI Spread Spectrum settings seem to be group of options or a kind of submenu and not just simple on/off setting,

but here in RFI section only or most important thing for me is the "main" RFI Spread Spectrum option, where you can select from 0.5% up to 6% setting, am mostly interested in testing the 6% option here..



Thanks in advance and kind regards !

/Alex

Also I forgot to mention something, my friend has same motherboard and wants also the same changes, but he also has access to a hardware flash programmer tool (DollaTek sop8 soic8 testclip für eeprom 25cxx / 24cxx + ch341a 24 25 serie eeprom flash bios usb programmierer.) so that he can recover the original bios if necessary and if flash process goes wrong, so whatever happens my friend will test first and has fallback option if unsuccesful, so don't be scared for me my friend will test on his z390-a pro first and then use the eeprom flasher if necessary to recover original bios!


he has already successfully managed to recover the bios with his hardware flash tool couple times now, but has not managed to make these changes I want to be successful yet.. (black screen after saving changes and flashing modded bios, because he is not sure exactly how to correctly save the change yet, he is smart guy but just never done this before, at least he has fallback option and can recover original bios without problem, so that is where we need expert help from this forum!)


Also I can say again, the most important thing is the RFI Spread Spectrum setting that can be set from 0.5% to 6% , and is default 1.5% value right now,

what I would like is basically to just change this from default 1.5% to 6% maximum value , and just save this change to the original bios file, and then my friend could then try to flash like normal from bios utility? because if it fails for some reason he can always recover bios with the eeprom tool, and only when everything goes OK on his flash I will then also do the same, that is the plan at least!

and maybe later if necessary could try unlocking the 2 other options (PCIE spread spectrum setting and HPET setting) but to start with just this RFI setting change from 1.5% to 6% would be good start!


thanks again !