I have the same issue and have had it for a while now on any game I play. Everything I have found online has been no help. I have tried changing the windows power settings and other settings in the Nvidia control panel as instructed by some guides that I found. I have even installed a fresh version of windows on my device with the issue just coming back after a day or so of it working.
Running PS command "driverquery /V | findstr nv", for me shows:
nvlddmkm nvlddmkm nvlddmkm Kernel Manual Running OK TRUE FALSE 10,326,016 7,909,376 0 2/28/2019 11:36:41 PM C:\Windows\system32\DriverStore\FileRepository\n 36,864
Event Viewer details.