hi, i have just turned on my computer and it beeped 5 fast times and showed post code d6 on the motherboard. the motherboard is a Asrock 970extreme4 and my graphics card is a zotac geforce 9500gt. The cpu is a AMD phenom II. i have tried manually resetting bios because i cant see anything on screen and the cable is not faulty neither screen because i tested them with other computers. if you have any suggestions that would help alot, thanks.