Dear NemesisChild, thank you for your quick reply!
The system did´nt start at all with the new PSU. With the old PSU it started, but only till Code32.
With different memory installation I did not try - but it´s a good idea.
I had never USB devices attached. (If i install Windows then from DVD).
Currently NO graphic card, wanted to use the Intel internal GPU for the first time.
The CPU cooler is Nocuta NH-C14S (14cm Fan, should be strong enough,
http://www.noctua.at/main.php?show=productview&setlng=en&products_id=111&news_id=)
No. I din´t check the CPU since I wanted to avoid this effort....
So the next step will be different tests with the memory as you recommended, this will take a while, i will do it tomorrow.
Thank you very much so far!