Hi guys, Thanks for all the replies, I've readed all the possible solutions carefully. Now I've found someone who can help me with installing the parts. He can also overclock my CPU. That will be propably 3.0GHz then. After that I think I will buy a 600 or 700W SPU. The only thing is the GPU. Because i play FSX more than ArmA I prefer Nvidia. I hope you can recommend some GPU's with these specs. Thnx for the help so far.