Hello, i started having this issue a while ago but now i just cant tolerate it anymore. So when i play a game ( any game ) i have very low fps even tho my laptop handled those games very nicely, for example Fortnite in which i used to have 80+ fps now i can barely have a constant 40-50, and when i alt+tab and look in task manager the CPU is 100% and GPU is about 30-60% used, and if i keep looking at the task manager the GPU goes up to 99-100% and the CPU goes down to around 40-60% and the game starts moving smoothly with 60+ fps as it should be. I tried windows reinstalls, drivers reinstalls and many settings, and i said it might be a temperature problem but the GPU is at 90 degrees which i think its a decent temeprature for a 5 year old laptop. I replaced the thermal paste and got myself 1 cooling pad and 1 klim cooler. I honestly don't know what to do anymore.
The laptop is an Asus Rog GL552JX with a GTX 950m, I7-4720HQ and i bought a samsung 860 EVO SSD and also upgraded to 16 GB of ram.