hi all i have an asus maxumus extreme with q9550 cpu 850w silverstone psu and a 5870 gpu i resently try to update my gpu to 290x but when the card is on the system i get black screen not even bios post i have the lastest bios update on the motherboard.dont judge me i know about bottle neck mu gpu but i wanted to start my pc update with just the gpu and then go to a mobo and cpu