There are many symptoms for video card problems like crashes, display corruption hangs, and more. There are many types and models of video cards, and there are many solutions for the problems that can appear.

You should first check if the drivers are installed properly. You can look for them on the hardware installation disc which you usually get with your graphic card, or you could look for them on the internet. Just install the drivers if you don’t have them or you can update the existing drivers with new ones.
Sometimes your graphic card may be overheating if you overclocked it. In that case just try to underclock it and it should work fine and it should not make any problem. Or you can try and buy a better cooling system for your personal computer tower.
You can also check your power supply unit, because it happens that power supply units can’t bring enough power to all of the computer’s hardware components. In that case it is best to go and buy another stronger one, because it could easily solve the problem.
There are many problems with video cards but most of them have a software nature, most of the times a plain installation or reinstallation of the drivers, or adjusting the settings can solve the problem.
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