So I have an Asus Zenbook Pro. It's the Core i7-i8750H. I noticed out of the box I hit thermal throttling within 20 seconds of running the stress test in the Intel XTU application! I got it down to -150mV and ran the test for 20 minutes straight. It's holding between 75-85C without any thermal or power throttling whatsoever. The machine appears to be stable thus far. I'll continue to test it but with that said, is there any benefit of me attempting to throttle it down even further? I understand there's gains to not having any throttling but if I'm already at that point what further benefit is there to try and underclock more?
Keep attempting up until you find your chips limit. It's a silicon lottery for a reason, some may get unstable at -100mv, while yours is already at -150mv. Afaik for that model, a sweet spot was approx -120mv area, hence, consider yourself already a lucky winner.
Okay I played around with it. -210mV after about 10 seconds of stress the screen just went blank. I dialed it back to -200mV it seemed stable. I ran Cinebench but got BSOD. Dialed to -180mV (didn't try 190/195) and it seems to be running fine. The Intel XTU CPU stress does not induce any thermal or power throttling. Cinebench running I guess it's using the GPU as well and bam I do get some throttling but it's not that bad.
I own a 7700HQ Laptop CPU. Did all my undervolt testing with XTU just like you. Then installed TrottleStop. Set the undervolt in the App. Made it start with windows and forget it. Nice tool. https://www.notebookcheck.net/How-t...ife-The-ThrottleStop-Guide-2017.213140.0.html Had to do this to make it start with windows: https://www.tenforums.com/tutorials...shortcut-without-uac-prompt-windows-10-a.html
