Corsair Vengeance LPX 2666 only running 2133 on Asus Z170-AR

Thesaints555

Honorable
Feb 17, 2013
3
0
10,510
Hi all!

Just built a skylake pc and having problems running my memory on 2666MHz.
What i tried is setting the XMP to 2666 but when i restart i get a black screen. After shutdown i get the asus message "overclock failed". I tried lower the frequency but it won't boot unless i set it to auto and that is 2133MHz.
BIOS version is 1702. Am I doing something wrong or is the memory or mobo broken?