I bad flashed my gpu from this website and didn't make a backup. it's not working due to it probably being a older bios version of the card?
http://www.techpowerup.com/vgabios/149860/xfx-r7260x-2048-131029.html
http://www.techpowerup.com/vgabios/149860/xfx-r7260x-2048-131029.html