Pros: Really easy to work with, and other than the case audio connections, ports are in very convenient spots. Installed E5-1660 and 64GB ECC on two different systems, and things are running blazingly fast under win 7 and linux

Cons: The mounting points are unusual, and my consumer case needed some modding

Overall Review: The issue with DIMM slots noted in other review is most likely due to bent pins or grounding because of contact with mounting offsets in case. Putting memory in the slots 4 A/B lead to a non-post with one of my two new systems. I was ready to RMA, but decided it was too much of a coincidence having exactly the same problem, so I pounded flat an unaligned mounting support in my case, and things have been working great for the past 24 hours.