Hey guys, so for about the last month my PC has been booting up with my Z77 extreme on-board intel graphics, instead of my HD 7970. In the device manager I see the card grey'd out with a code 12. I've tried setting it to boot from PCI-E in the bios, uninstalling the on-board graphics, and completely clean installing the correct graphics drivers. It's gotten worse lately, the last couple of days I've turned on my PC to black screens, and straight to the bios. The card is about 3 years old, I need a way to be sure it is or isn't the card. I'd like to sell it to put in a little bit towards a 1070, but I can't without knowing. Thanks for any help in advance.