I hate to say it but some asus boards just flat out don't agree with certain ram. I've seen it with the x99-e ws and a certain g.skill 3000 ram (8x8gb). Board refused to clock it via xmp and i couldn't get it to run at spec no matter what manual settings i tried. Even at stock 2133 the machine would have random reboots, blue screens, etc. Tried a couple other different kits and they worked fine. It's just the nature of the beast.
The weird thing is that the board is able to boot with XMP mode @ 3200MHZ ( Original Ram Speed ) with 4x 8GB . But anything more than 4 stick ram the XMP wouldnt boot at all . Any other advice ? i have the latest bios version 1701 still cant get it to boot @ 3200 MHZ 8x8GB XMP mode or 3200 Via Manuel setting .