I have an Acer Swift 3 (SF-315-51G) laptop. In any game that I play when plugged in I get FPS drops. I installed MSI afterburner to find out why and found that the GPU reaches a temperature limit at 69 degrees. I don't have any issue when I play on battery the fps is locked at 60 with a little variance. But when plugged in with vsync on(or off) it gets huge fps drops. What should I do to prevent this?
I would suggest changing your Processing Usage to around 50%. You need to go to Control Panel then go to Power Options and then switch it to High Performance. This will not limit the temperature of the GPU.