just bought a new gigabyte hd radeon 7750 and cannot install display driver,it says no display driver been installed or the driver is not working properly something like that
check that you have all the power plugs to the video card plugged in and that the gpu fan is moving. also check that you installed the video card in the right pci video slot. if there two blue slots one is for the main video card the other is for the sli card. also you have to move the video cable from the mb to the new video card. if the card is working you shoudl see the bios post screen at power up on your monitor. on the newer mb you have to change the first video boot device from iped to pci.