Hm, yeah.
Wayne: just to be on the safe side, try this:
1 - download the latest drivers from Nvidia (don't install yet)
2 - download DDU (Display Driver Uninstaller)
3 - run DDU in safe mode to remove the Nvidia drivers.
4 - you may need to run it again to install any stray AMD video drivers (if you had an AMD card before), or Intel video drivers.
5 - reboot
6 - install the Nvidia drivers you downloaded in step 1.
7 - after all that, let Windows do any and all updates it may want/need to do. Go to Start -> Settings Gear Icon -> Updates & Security and click Check For Updates just to be sure Windows pulls in everything it needs.
Then try again and see if that helps.
Ultimately, though, it could be a syncing issue. If your monitor does NOT have an adaptive refresh, then some jittering can occur when the frames dip below the refresh, or tearing above.
What is the manufacturer and model of your monitor?