Thanks for you suggestions, this is my final specs now.
Intel i5 4570 3.2GHz
12GB RAM
Nvidia Geoforce GTX 1050 Ti Twin x2 4GB GDDR5
3R System 450W power supply
120GB SSD / 500GB Hardisk
Intel i5 4570 3.2GHz
12GB RAM
Nvidia Geoforce GTX 1050 Ti Twin x2 4GB GDDR5
3R System 450W power supply
120GB SSD / 500GB Hardisk