OK, my system passed 1 hour OCCT with DDR@1600Mhz.
And with the same settigns it also passed 2 passes of memtest86 3.4a.
Can i call the system stabel with these settings?

I am gonna do some further OC's this weekend.
What should i use for a quick stability test when oc'ing?
I cant wait for 4-8 hours of prime,.....