Welcome to the forums, newcomer!
Mind sharing the make and model of the PSU and it's age? You should also include the make and model of the sticks of ram in your system. As for your build, how much did you pay for it, considering you had it built? You might want to also state the OS version at the time of writing if you're on Windows 10.
You could try and source the latest driers from Nvidia's support site, give DDU a try, uninstall your GPU drivers, then reboot, then reinstall your GPU drivers in an elevated command, i.e, Right click installer<run as Administrator.