Hey guys I just got a Gigabyte Radeon HD 7950 3GB OC, I removed the drivers from my old graphics card (GTX 560ti) and installed the 7950. When I boot up the computer it shows nothing but a black screen, but when I put back my old video card in it works fine. Is something wrong with the video card or am I missing something? My computer is I7-3820, Motherboard is a MSI-X79MA and power supply is 650. Any idea what the problem would be, any help is appreciated.