GA-Z77X-UD3H I had this board for about three days. It was three days of troubleshooting that never resolved my memory problem. I finely contacted tech support and they told me that the MB has an undocumented and previously unknown issue and is incapable of using the onboard RAID and a add in RAID card. They could never resolve the memory issue. But both work with no problem on the AsRock board that I have now. I am not sure how much faith I can put in a company that designs a board then after the fact discovers that “it does not work as planned because they did not design it with enough shadow memory”. Their words not mine. Some of the finest boards? Not to sure about that.