Editing limits of values in Z170 BIOS?

BIOS/UEFI Modding BIOS Modding Guides and Problems
1

Hello, I apologize if this has been answered before, but I wasn’t able to find anything about it.

I am trying to edit the min/max limits of values in the BIOS of an Asus Z170-P-D3, but couldn’t find anything about it. In particular, I am trying to raise the DRAM voltage above the 1.8V limit for the purpose of overclocking.

I already modded the BIOS with Coffee Lake support and ReBAR, as well as un-hide the “above 4G decode” option, all of which works fine, but I’m unsure how to proceed with this specific change. AMIBCP doesn’t seem to be able to edit min/max values.

Does anyone have ideas or posts to point me towards? Thanks!

2

the limit should be in 899407D7-99FE-43D8-9A21-79EC328CAC21 pe32 image, you can use ghidra to disassemlby it.

3

I’m not very familiar with Ghidra, I’m afraid. I extracted the module via UefiTool and loaded it in there, but could only find the strings with my limited knowledge. I also tried to use the efiseek plugin, but that didn’t help me either.

Any advice?