There are a variety of possible causes which can lead to a graphics card not being detected in the Device Manager. This issue can be caused by software or hardware issues.
Software Issues
The most common cause of a graphics card not being detected in the Device Manager is due to a driver issue. The Windows Device Manager will not detect a graphics card if there are no drivers installed or if the drivers are out-of-date or corrupted. To resolve this issue, you will need to download and install the latest graphics drivers from your graphics card manufacturer’s website.
Another software issue that can lead to a graphics card not being detected in the Device Manager is if the card has been disabled in the BIOS. If this is the case, you will need to enter the BIOS settings of your computer and then enable the graphics card to allow it to be detected in the Device Manager.
In some cases, the issue can also be caused by out-of-date BIOS firmware which may not support the graphics card. If this is the case, you will need to download and install the latest BIOS version for your motherboard from the manufacturer’s website.
Hardware Issues
If the software issues mentioned above do not resolve the issue, it is likely that the issue may be related to a hardware problem. The most common cause of a graphics card not being detected in the Device Manager is due to a faulty or loose graphics card. If this is the case, you will need to open up your computer and check if the graphics card is properly seated into the PCI-E slot.
It is also possible that the graphics card may have been damaged by overheating. If this is the case, you will need to clean the card using compressed air and then reinstall the graphics drivers.
In some cases, the issue can also be caused by a faulty or incompatible power supply unit (PSU). If this is the case, you will need to check if the PSU is providing enough power to the graphics card and if it is compatible with the graphics card. If the PSU is not providing enough power to the graphics card, you may need to upgrade to a higher-wattage PSU.
Conclusion
In conclusion, there are a variety of possible causes which can lead to a graphics card not being detected in the Device Manager. These issues can be caused by software or hardware problems, such as driver issues, BIOS settings, out-of-date BIOS firmware, faulty or loose graphics card, overheating, or an incompatible power supply unit. To resolve the issue, you will need to diagnose and identify the root cause of the problem and then take the appropriate actions.