[SOLVED] I have done EVERYTHING but Dell XPS 15 9560 still randomly causing unplayable FPS drops / unusable Windows 10.

[brisk]

I have a Dell XPS 9560 and when I play a game, it will just random decrease in FPS for maybe 10 minutes. I can play WoW Classic or Halo MCC for hours and hours then it just all of a sudden my machine will become unsuable, Windows will be very slow and laggy. It seems to recover itself after maybe 15 minutes? I have done ALL tweaks possible and testing and I can't understand why this happens so I don't get what the <Mod Edit> is going on. This is what I've done:

-Padded VRMs
-Repasted CPU and GPU
-Undervolted CPU by 110 and iGPU by 75
-SST is on, EPP is set to 110
-Turbo boost is off
-Used MSI afterburner to undervolt GPU
-Battery is disconnected, it's on some 'ultra performance' power mode.
-Uninstalled Intel Dynamic Thermal Framework
-Disabled BD PROCHOT
-Nvidia control panel is set to use integrated graphics for everything apart from my 2 games (WoW classic and Halo MCC - not demanding games).
-I have the machine plugged into 180W WD19 docks (connected to 2 screens, I game on one of the external screens) - This is the only variable I can think off which is maybe causing issue.
-My temps are like 60s maximum when gaming, maybe the odd bit of 70 if its a warm day.

I'm running a very streamline version of Windows 10, it was like 2GB or something. Maybe it's that but hmm.

 

[lga1156_ftw]

• Try internal screen or max 1 external screen without dock connected (issue remains or not?)
• clean install windows from usb stick (format everything), make sure you know your windows key before doing this