Am trying to put a Sapphire HD 5450 1GB DDR3 in a Dell Optiplex 745 SFF. Have enabled the Bios to look for the new card. When I put the New Card in, I get no video feed, even though I can hear the new Hardware noise coming on. My Bios is 2.6.6. The intel onboard Graphis Driver is 6.14.0010.4943. VBIOS is 1345. I have seen other people online using this card, so I know it can be done. Please Help!