Thanks for your reply Juraj!
Yes I went for the manual as a first solution :) my specific beeps is not in there, I have built several computers without any problems until now.
Everytime a started the computer it finds the memory modules, all 8 and also one by one. And yes all the 8 modules are being read, in windows it says 64gb (63,9gb usable) and when I boot it says 65536mb ram.
Besides the beeps everything feels slow, POST shows up 2-3 times before starting to load windows and windows 8 is booting up way slower (like twice the time) than my i7 3930k with windows 7.
No errors, everything it working except those beeps and that it feels slow, and it shouldn´t beep at least!