Hi - just wanted to share my experience with undervolting. I bough a new laptop and before had no idea about undervolting/overclocking etc. so I had to do a lot of research and trials to find the good method. I don’t have much knowledge about it, but here are some important things I found out. I tried Throttlestop, MSI afterburner, but in the end just sticked to Intel XTU, without undervolting the graphic card (4080).
So first what I needed to take care of:
- Disable undervolt protection in BIOS
- Disable Windows Virtualization and Hyperwisor (I am using VMWare, and it actually made my VM much faster)
- Disable Memory Isolation
- Disable windows fast startup (was needed for XTU to start automatically, I didn't notice any significant decrease in startup).
- I configured Razer Synapse not to run on startup, but I keep it installed for any setup needed in the future. It should have set overclock on, no turbo power limits, cpu set to turbo, gpu to whatever you want (before I made a mistake- switched cpu to limited power in Synapse, and then overclocking on - and it was overwriting the XTU settings).
About the undervolting value I was able to achieve in XTU, its something like this:
P-cores 4,5 - ratio x52 and voltage offset -0.130
Other P-Cores - ration x50 and voltage offset -0.140
E-Cores - no change for ratio, voltage offset -0.140
Cache voltage offset for P-cores and E-cores -0.130
I limited the power to 52.5 W and 65 W for short term. It lowers the performance, but in Cinebench r24 I am getting 1100 pts for multi and 114 for singlecore test.
It makes my laptop almost silent, if I do regular stuff - internet browsing, word, vscode, etc. the fans are off practically all the time. I hope you will find the info useful, especially about the features that need to be switched off for xtu.