In this case, there are many possibilities; 1: The independent graphics card needs auxiliary power supply, but it is not plugged in, and the graphics card cannot work due to insufficient power supply (or low power supply);This can determine whether the graphics card needs auxiliary power supply; 2: The independent graphics card is incompatible with the motherboard, which makes it unable to use normally;For example, when the main board is powered off or the host is powered off, remove the battery from the main board and replace it 5 minutes later, so that the main board can recognize the hardware such as the graphics card again. If there is a new BIOS on the main board, try updating the BIOS to the latest version;If it doesn't work, there's no choice but to replace it with another video card; 3: The independent video card itself is broken and cannot be used when inserted. This needs to be replaced or repaired for the video card itself.
It is possible that the video card has poor contact, damaged video card, damaged video card interface, and the power supply is not enough to move. It needs to be judged according to the situation
