When I had the problem you had , It actually had nothing to do with the actual ram or the dimms. It was actually the motherboard socket itself. I had bent pins from some prebuilder who thought muscling a cpu cooler on it was funny and of course ASUS will not replace motherboards with bent pins so the best thing to do if your a bit savvy is to either get yourself something incredibly small to use with some good magnifying glasses and continunue to try and put the bent pins back in a someone upright position. And if your not soo savvy then kiss your money goodbye because its a pretty penny to have asus fix it. But if you do manage to get the pins back in the right upright position then you very well could have a decent motherboard. But its a miticulous process and it requires a steady hand so take your time and protect your socket and make sure when you replace the cpu cooler to be extra carefull. the piece of technology underneath is expensive to say the least.