I have been playing on this laptop for a long time on consistent 60 fps with no issues. However, I downloaded War Thunder from Steam yesterday and it worked well, but after an hour the FPS dropped to 30 and got capped there for no reason.
I restarted the game, restarted the PC, disabled V-sync from Nvidia control panel, and deleted the whole game and its driver. Still, the fps starts at 60 and then drops to 30 after some time on all games.
GPU: GTX 1650
RAM: 8 GB
SSD: 512 GB M.2 NVME
Battery: Connected all time so no need
GPU Driver: 456.38
Security: The PC was never exposed to apparent Virus or Malware threats