I have http://www.newegg.com/Product/Product.aspx?Item=N82E16820227362 running at 5-6-6-18 at 1.8v(well thats what cpu-z tells me). I purchased http://www.newegg.com/Product/Product.aspx?Item=N82E16820227298 this runs at 5-5-5-18 at 2.1V - 2.2V. Now when i put the second set in, my computer crashed like every 5 minutes. I know your not supposed to mix ram with different voltages and timings. My question is : How do I get both of them to be stable together?