Too many things that can cause these problems without knowing version of Windows, CPU, Motherboard, RAM, chipsets, etc.
First thing that comes to mind; Did you uninstall the Nvidia drivers "COMPLETELY", I mean get rid of all the nasty associated apps that are installed with the drivers you will find in the "registry". These are the reason I use BC Uninstaller. It searches the registry for all of these leftovers associated with the drivers and gives you the option to delete them. Next; uninstall your Adrenalin drivers in the same manner. Shut down Windows and let it set for 15 - 20 secs, this is called a "cold system restart". I prefer these, at times, as opposed to a warm system restart.
Now check your display ID, make sure that Windows is seeing the correct monitor and not the default. Make sure you have the latest monitor drivers installed for your display. Set the resolution to the default, there is a reason for it.
Check your BIOS; is it up to date. As new hardware comes out on the market the BIOS may need to be updated to accommodate it.
Are you overclocking the CPU, GPU, RAM. If so reset all to default.
Make sure Windows has the latest updates.
Try these first, because the list goes on and on.
Vynski
If it ain't broke; don't fix it!