run 3dmark, after the benchmark click on "compare results online" and post the link which comes up in your bowser
uninstall the nvidia drivers with "ddu" uninstaller and reinstall the latest drivers from nvidia.com
update your motherboard´s bios via bios itself. Download the latest BIOS and unzip it to an USB flash drive, reboot, enter BIOS, select the flash tool there. Don´t flash in windows!