Summary: First DOA, Second Died. Got less than a few weeks use on #2, dies. Similar reviews from other sites. I never overclocked the unit. I am an IT nerd and know what I am doing. This is not a case of user error. Working on warranty claim now.
Summary: Buy this motherboard and did not work at all. Originally presented problems 2x4G Corsair Vengeance 1600 (CMZ8GX3M2A1600). After about 30 hours invested in testing, research forums and have not accomplished anything and Asrock support staff has given me a small help. Basically told me that memory is not in the QVL motherboard. So buy Kingstom 1600 2x4G (KHX1600C9D3K2/8G) memory is in the QVL. The bad surprise is that it does not work.