This is simple tearing test. Screen tearing often has place during video games. If you see that somethings is wrong with your refresh rate, make this test.
Best solution is to update your graphic card driver and check nvidia or and sync.
Screen tearing is a visual artifact in video display where a display device shows information from multiple frames in a single screen draw. The artifact occurs when the video feed to the device is not in sync with the display's refresh rate.
How do I fix my GPU screen tearing?
How to Fix Screen Tearing
Changing Resolution and Refresh Rate. ...
Enabling / Disabling NVIDIA VSync. ...
Disabling 'Game-mode' and Full-screen optimizations. ...
Checking Graphics Drivers. ...
Turning Off Frame Limit. ...
Disabling Smooth Scrolling. ...
Using High-Performance Power Plan. ...
Using Another Browser.
Nvidia GTX, Nvidia RTX or AMD.
Screen test, display test, video test.
