actually there is a shortage. I work in IT. We are waiting on our shipment of new pcs. no I8s in stock. gone through 2 vendors. having to downgrade to I7s for the time being
try the auto detect tool from AMD. That is what i had to use when I had to redo my whole OS and didn't have the original disk for the GPU. Also what OS are you running?
http://support.amd.com/en-us/download/auto-detect-tool
I would suggest installing the drivers if you haven't already. There should also be an option in the bios to use the on-board or pci video- depends on what bios you're running. here's the link for the drivers. Give it a shot and see if that helps...