First off im sorry for the thread necro. As so many people have asked and no one answered. I recently picked up this laptop and was wondering the same question. This was a popular google hit and I came here for answers. Note: I am just picking the 90Hz option off the bat as thats what worked for me. If you are doing this by yourself on your own laptop I cant stress enough that you should be doing it in smaller jumps like 5 - 10hz at a time. Otherwise you will be spending a lot of time trying to find the sweet spot. Like for LTT the 90Hz setting has been solid and smooth for me. But I may have been lucky. Windows:
You can do it in the Nvidia control Panel if your GPU ports directly to the montior but as this is a laptop it seems to do some voodoo between the CPU and GPU video display, I could not get it to give "display options" in the Nvidia control panel.
I downloaded and used CRU like Linus did in the video. Set a custom resolution of 1920x1080 at 90Hz. Saved it. Rebooted and then went into Display > Advanced Display Settings > Display Adapter properties for Display > Monitor and in the drop down picked the 90Hz option.
Note: If you push it too far you will have to jump back into safe mode and re-set it. I recommend testing with 5Hz jump at a time.
After a reboot I was looking at 90Hz stable. Linux:
This was a bit more complex but not too bad.
I recommend making sure you have both xrandr and arandr. so just apt / dnf / -S or whever you use to get them.
cvt 1920x1080 90
This will give you an output like:
Modeline "1920x1080_90.00" 269.00 1920 2064 2272 2624 1080 1083 1088 1140 -hsync +vsync
remove the word "Modeline" and paste the rest into xrandr but with --newmode
xrandr --newmode "1920x1080_90.00" 269.00 1920 2064 2272 2624 1080 1083 1088 1140 -hsync +vsync
Next is xrandr --addmode <Name of DIsplay> "1920x1080_90.00"
xrandr --addmode eDP-1 "1920x1080_90.00"
Now all you have to do is run
and pick the 90Hz option.
(you will need to write a script to make this a full time setting)
Once again im sorry for the thread necro but hopefully this helps others like myself.