When ever I change the voltage on my ram my cd rom /dvd drive is not Identified until I turn the power off and reset machine then it's fine unless I change the voltage again. This started once I put my new Gskill ram in my computer. This ram is a great overclocker but I don't think a voltage change should make it do this. It didn't do this with my old OCZ ram. I might rma it and try 2 new sticks.