I'm running a Ripjaws kit at the same timings. I couldn't budget the lower timed 1600 ram when I built my rig... ram prices weren't so low then. But that's what they're spec'ed at - at least in my case.
Then that is probably close to the best you will be able to get out of them ( those are most likely modules that failed at tighter timings and thus were binned for the lower spec so probably not a lot of headroom left that they will remain stable at !)
So i should let it like that ?
I just want to know if its better a CL9 or CL11 ?
CL9 is better but if they are spec'd at CL11 then chances are they will not run at CL9 otherwise they would have been binned higher and sold at a higher price -- the companies usually only sell modules at that high a latency if they have failed to remain stable under testing at tighter timings !)