I have the same kit and i am stuck exactly like you .. can do CL 13 but not 12.. and everyone pretty much can do Cl12 .. i tried till 1.55vdimm
How did you manage the Cl12 ? what settings did you change ?
Awesome stuff guys.. Loving these sticks so far.
I got lucky too.. picked them up at 330 $ on day 1.. these things have skyrocketed ever since