Ohh I see. Have you looked over all your BIOS options? Of course I don't have your board so I don't know but that maybe worth your time.

And give GPU-Z and update or double check with another program like SiSoft Sandra http://www.sisoftware.net//?d=dload&f=sware_dl_3264&l=en&a=  Sometimes some software can give false reports due to different hardware configs.