:smartass:I have just upgraded my CPU to a Intel Core 2 Quad Q8200 2.33GHz 1333FSB, the motherboard is a Gigabite DA-965P-DS3. When I fired it up my screen reports it is not recieving a digital signal from the Zotac GeForce 8800GT 512MB GDDR3 PCIE card. I have reseated the card and checked that it is getting power, the fan is working so power is there. I have also reseated the RAM Patriot 4GB PC2-6400 Extreme Performance,800MHz also tried them one at a time but no sucess.:no: Can any one out there give me any ideas please, one thought I have had is maybe the mother board does not support a Core 2 Quad. I have checked with another PC that the screen does recieve digital signal and works correctly.