I currently have a GeForce6100PM-M2 motherboard with an onboard graphic card. I bought a new XFX Radeon 6670 graphic card in order to play Diablo 3. However, I tried to disabled the onboard graphic card and place the graphic card in the mobo with the monitor plugged into the new graphic card and there was no signal. I took the new graphic card out and plugged the monitor back into the onboard graphic card and the computer booted fine. I then enabled the onboard graphic card and turned off the computer. I installed the new graphic card in the mobo again and plugged the monitor into the new graphic card and again no signal on the monitor. I plugged the monitor into the onboard graphic card while the new graphic card was in place and I could hear the computer booting up but there was no picture. Do I need to install the drivers for the new graphic card before I actually turn the computer off and place the card in the mobo.