To reset the CMOS:
Turn off your PC and unplug the power cord.
Remove battery and wait for 30 seconds.
Replace battery, plug in the power and turn your PC on
You can see the manual for your motherboard here:
http://europe.giga-byte.com/MotherBo...8vm533_p_e.pdf
Check the manual out and look at the "NOTE" on the first page, explains problems that have been encountered with
certain graphics cards.