With IRFExtractor_0.3.6 we can convert the file into a human readable form which can be opened with a text editor.
The file (DriverSampleDxe), containing the string, is then extracted with “extract as is”. With the UEFI TOOL, we search in this file (or in the dumped BIOS file) for the string “Overclocking lock”. In this folder, we can find the UEFI_FW.bin file. After we have started the exe, we can quickly copy the folder “Program Files/Huawei” to another location. Alternatively, we can extract the bios.bin directly from Huawei by downloading the bios update exe and let it run in a Virtual computer (e.g. The tool can be downloaded here ( ), I used version 14.0.11 of the Intel CCME System Tools. To find the Var Offset, we either extract our BIOS with the Intel Flash Programming Tool FPTW64.exe. I am not responsible for any bricked computer.įor the followings steps you need the Universial IRF-Extractor and UEFI Tool, both from user LongSoft: Please proceed with caution and do not simply “try” something. We are modifying during this process the BIOS of your beloved Matebook, which can possibly brick it. Finally, we need to delete any microcode update from Microsoft (removal of mcupdate_GenuineIntel.dll).īefore we start, a little warning. As multiple variables use the same offset in the Huawei BIOS, I suggest using Ru.exe instead of the default setup_var tools, as with Rue, we can select VarOffset and VarStore. Next, we need to modify this variable back to 0x0. In order to activate it, we need to do three things: First we need to find the offset (the location) of the variable in the UEFI variable storage. In recent BIOS, this variable was changed to 0x1 (enabled) and so undervolting was no longer possible. Until BIOS 1.5, this variable was set to 0x0 and so disabled.
However, they were not really removed, they were only locked by an UEFI variable called “Overclocking Clock”. Some of you may remember that officially undervolting is only possible with BIOS versions up to 1.5 as, due to Plundervolt, Intel forced the device manufacturers to remove undervolting capabilities. Undervolting on Huawei Matebook X Pro 2020 i5 with BIOS 1.12, -75mV is stable for me. As proof, I present you here the results of this work on my Matebook X Pro, 2020, i5 version with BIOS 1.12 that I’ve undervolted to -75mV. Thanks to excellent posts of /u/Snoozhead and /u/Wouter_001, I have found a way of how we can enable undervolting on all Huawei Laptops, with all BIOS versions.
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