I've recently built my first computer and it's just been one thing after another with issues due to my novice point of view. This time, once installing windows 7, I checked to see if it was using my graphics card and it's set on the in-built graphics. I've checked the connection and once the pc is switched on the fans spin on the card. However, the hdmi cable does not work once hooked up to the card. After switching the pc on, I placed the disk with the drivers on it and yet nothing has happened. Is there some place I need to switch from the inbuilt to the HD 7850?