Last night I was installing a new cpu fan and when i tried to boot it up it would turn on for whatever reason. I really can't remember hitting the bio reset button on the back. It loads up with 4Gbs but when I add the 3rd stick it just stays on stand by with no bootup screen or anything just post code 68. All three sticks are Corsair Dominators at 2GBs each. I've change the sticks to back and forth and I can confirm its not the memory. Again everything was fine till I changed the cpu fan and I'm not that stupid I know its not the cpu fan. Could it be the 3rd slot maybe a bio issue. any help would be greatly appreciated.