delgado50Well I guest that could be the issue, But I never OC, other then setting it in the XMP 1st profile that all I did not play or set any voltage in the IMCs. Now I can get it to pass 1600mhz and stable anything above that it will crash. I could run it at 2000mhz and 2187mhz but not stable and eventually will crash. kougar, yes is the same PSU. I will try it with CL8, Thanks guys.