Uninstall gpu driver DDU (clean and do not restart).
Uninstall all the processors on device manager (should be 16 on yours, also when it asks for restart, click on no) like this:
Restart the pc to bios, and update to the latest bios again. Then go to bios again after update and load default or optimized settings.
boot up to windows and install the latest Chipset driver, reboot, go to power plan and choose amd ryzen balanced, and connect to internet.
Install the latest nvidia driver.
*do this all offline until reboot after installing chipset driver, also you may reboot to bios after all of this to set the XMP (and previous settings you did) and make sure ram is on slot 2 and 4. Download needed files (highlighted word) before doing step 1, do the step by orders.
And check windows update (and optional updates) if there is any and install them. Also enable Hardware Accelerated Graphics Scheduling (available on the latest win 10 update) in graphics settings like this and reboot:
Make sure the psu connected to the gpu is 1 pcie cable per 1 slot (use main cable, not the branches/split) like this: