The Seasonic M12II 520W Bronze is enough for this system or i need a powerful psu
http://www.mediadot.ro/wishlist/22404/
http://www.mediadot.ro/wishlist/22404/
Hardware installation
Installation of any of GeForce graphics cards is really easy. Once the card is installed and seated into the PC, we connect the two 8-pin PEG power connectors to the graphics card.
Here is Guru3D's power supply recommendation:
GeForce GTX 680 - On your average system the card requires you to have a 550 Watt power supply unit.