So as in title. I noticed my PC lost some of it's power in last days. BeamNG works worse, Forza Horizon 4 too, didn't check other games. BeamNG is running in 30fps, meanwhile Forza works in 50fps and with drops to 40fps. Previously both games were running in 60FPS. I checked for viruses, all clean. PC specs: Intel Core i5 8600k with Turbo Boost ON. 16 GB's of ram. 1060 6GB. What could be the reason?