I got an Alienware 15 R4 in June 2019 running a GTX 1060. For the past few months, I've been having gradually degrading gaming performance. I started noticing it about 6 months ago when I would get random FPS drops in Rainbow Six Siege, almost as if this all started when my warranty expired. Now, Rainbow Six Siege doesn't even go above a certain FPS in the main menu on the lowest settings to the point that it's completely unplayable; games that can easily run on a 9xx series GPU like Civilizations V lags 100% of the time and never maintains 60FPS or above.

I tried tweaking the settings on my NVIDIA Control Panel as recommended elsewhere and using a high power setting for my power plan, but nothing has made a difference. I also did a full reformat sometime in the past months and, if anything, it made the laptop's performance worse.

Would appreciate any help.