after upgrading my core i5 650 to a intel xeon x3450 in my gigabyte ga-p55-ud3l motherboard, i enter the bios and it only sees 4gb even though theres 8gb, i check the pc health tab and it shows that it recognises all 4 2gb sticks but the slots arent enabled. I checked for bent pins and trash in the socket to find nothing, any suggestions?