I recently purchased a Sapphire Radeon HD 7850 to use in my computer build. However, the computer does not detect the card. It does not show up under device manager, and the AMD Catalyst program can't install the drivers because it cannot detect the card. The card is powering up, the fans are running smoothly, and the LED turns on. Here is a list of the other components in the build, all of which have been checked to make sure they are compatible.