Very helpful answers. Thank you all very much.
My machine crashed already two times during mining with 12 and 10 threads. I guess I have to go down to 8 threads.
Maybe with the suggest aeon-stak-cpu I will be able to mine with more threads.
As soon as my setup is ready to go, I think about joining a smaller pool.
Ad as soon ASUS finally releases the new Custom Design RX Vega 64 I will have a lot more hash power.
Would you recommend a other graphics card than the new AMD Vega 64?
I didn't know that the MacBook is able to mine as well and I will set up this system up after my Desktop machine.
one more thing: I have a Linux and a Windows system on my same machine. I s there a difference in hash rate between the two?
I read somewhere with Linux mining is better, more stable? better hash rate?