NC,Problem seems to have been completely resolved with the removal from the system of an internal sata drive dock for hot swapping bare sata drives. It was the disconnection of the power to the dock that resolved the problem. Seems very strange, but ...
NC,Currently I am only able to test on one system. According to ASUS Qualified Vendor List for the X99 Deluxe-II:DC 750 Series 400GBis supported in the section on PCIE SSDs. See:http://dlcdnet.asus.com/pub/ASUS/mb/LGA2011/X99-DLX_II/X99-Deluxe_II_Dev...
I have been banging my head against the wall with exactly the same problem on a different system:with 2 of these SSD's:Asus X99-Deluxe IIIntel 5690X64GB RAMNvidia GTX 970ASUS Bios 0801Very simply, drive works fine until the system is powered off. Whe...