There are a number of reasons why your graphics card may not be displaying correctly on Windows. The following is a list of possible causes and solutions:
1) Outdated Graphics Card Driver: The most common cause of graphics card issues on Windows is an outdated driver. Drivers can become outdated due to new versions of Windows being released or by simply not updating your drivers regularly. To check if this is the cause, try updating your graphics card driver as described in the manufacturer’s instructions. If there are no available updates, try uninstalling the existing driver and then reinstalling it or using a compatible driver.
2) Incorrectly Installed Graphics Card: A graphics card may not display properly if it isn’t connected correctly to the motherboard or if it is installed in an incorrect slot. Check to make sure that the card is properly seated in the slot and that all the cables are securely connected.
3) Incorrect Display Resolution or Refresh Rate: If you have recently changed your monitor’s settings, such as its refresh rate or resolution, it could be causing your graphics card to display incorrectly. Try resetting the monitor settings to the default settings and see if this resolves the issue.
4) Faulty Graphics Card: If your graphics card has suffered from electrical damage or if it has been overheating, then it may be faulty and need to be replaced. This is usually indicated by the video output being distorted, blank or fuzzy.
5) Bad Power Supply: If your graphics card requires more power than what your power supply is able to provide, then it may cause your graphics card to not display properly. Try upgrading your power supply or getting a higher wattage unit that can provide enough power to your graphics card.
6) Overheating Graphics Card: If your graphics card is running too hot, then it may cause it to malfunction or to not work correctly. Check to make sure that your case has adequate airflow, that your fans are working correctly, and that your graphics card has enough thermal paste applied.
7) Corrupted Graphics Card Settings: If your graphics card settings have become corrupted, then it may cause your graphics card to not display correctly. Try resetting your graphics card settings to their defaults and see if this resolves the issue.
8) Faulty Software: Sometimes, certain software applications can interfere with your graphics card and cause it to not display correctly. Try uninstalling any recently installed applications and see if this resolves your issue.
9) Faulty Hardware: If you suspect that there is a problem with your computer’s hardware, then it may be causing your graphics card to not display correctly. Check to make sure that all of your components are functioning correctly and that they are properly connected to the motherboard.
10) Damaged Graphics Card: If your graphics card has been physically damaged then it may cause it to not display correctly. Try replacing your graphics card with a new one and see if this resolves the issue.