How to switch from integrated to dedicated card


I built a new computer recently.
I have a Radeon HD 7770 that I want to use in the computer, but the computer is set to its integrated graphics.
I already downloaded the drivers for the 7770; what am I supposed to do?

Also, I am currently using the VGA line to connect monitor and computer, but the video card seems to have a DVI line. I keep getting "No Signal" when I only plug in the DVI line. Will this problem be solved if the main video card is switched from integrated to the 7770?

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More about switch integrated dedicated card
  1. in you bios the pci-e card must be set pci-e first after save setting.close your system put thehd 7770 in plug all power cable needed then connect ot this card with your monitor and restart system .
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