This helped me to get rid of tearing on my nvidia card with proprietary driver.
1. You must have proprietary driver installed.
2. Open Nvidia X Server Settings (can be found in control center or in app menu)
3. Follow the steps marked on the screenshots:
1) go to X Server Display Configuration
2) click Advanced
3),4) click on checkboxes
5) click Save to X Configuration File
6) click Save
4. Now reboot and feel the difference