Summary: This is a nice motherboard that could've been perfect but...... 1. the DIMM tabs (bottom tabs) on the memory slots are too close to the first PCI-E slot. I had to trim them to be able to populate that first slot (4-way SLI). 2. the board doesn't have a PCI-E slot enable/disable physical switch or BIOS option. This means to troubleshoot your graphics cards you need to physically remove them from the slots.
Summary: Can't fault amazon they delivered very quickly and when the board developed problems they were quick to offer a return or replacement. The P9X79-E for me would easily score 5 out of 5 if it not for the fact I have had two bite the dust in the last 3 months, not sure whether it's QC issues on Asus's part or just a fundamental problem with this batch of boards but I have to say Im extremely disappointed especially when Asus make such great boards.