Thanks for your reply.
O.K. I will give the G-Skills 9600 a try.
I questioned for "the right memory sluts" because one stick wouldnīt fit with their headspreder under my Thermalright IFX-14. It does not seem to be a question of the right sluts but of the right DRAM Clock Skew settings.

Another quest to MemSet V4.0. Do I get you right, that one time save setting plus load will change the tREFs after the next system boot and so on ?