xiaomi notebook pro Tips

bios flash & undervolt

with _Cyb‘s patch(known from reddit) and win系统一键刷BIOS, we can flash bios 603, 502, 300 and undervoltage in a super easy way

how to

1. Download voltagebios
2. In folder bios, delete TR100A04.fd, rename XMAKB5R0P0603.fd(or 502 300, the version you want) to TR100A04.fd, run H2OFFT-Wx64.exe to flash, it will automatically reboot multi times, please do nothing
3. With 300, undervoltage is not limited
4. With 603 or 502, goto folder voltagepatch, run Patcher.cmd in Administrator, reboot manually

Downgrade is support, I flash 603 in 502 and flash back and flash back

The patch need powershell which doesn't exist in my lite win10, and I fail to install wmf. So I use Windows 10 (business editions), version 1803 (Updated Jul 2018) (x64) from msdn.itellyou, no problem

Now you can use XTU in windows, and intel-undervolt in linux to undervoltage, here is my /etc/intel-undervolt.conf

apply 0 'CPU' -100
#apply 1 'GPU' 0
apply 2 'CPU Cache' -100
#apply 3 'System Agent' 0
#apply 4 'Analog I/O' 0
tdp 50 50

with my i5-8250u, -120mv causes blue screen, -100mv is fine

fan patch

_Cyb give patchs which contain raising the start spin temperature, you can now keep the fan quiet under 52 or even 60 degree

how to

1. Download patches
2. Follow the readme inside

In order to let the EC read new firmware, I use 0% battery shutdown, the patch works after boot.

see also xiaomi-notebook-pro-bios-patcher to custom fan speed curve

If any issue, goto the original page, all sources linked.