Hello Sagreb!, :wave: First of all I want to say don't get fooled by the watts only, it's better to get a good quality 300W PSU (like antec) than a powmax 400W, I've burn two PSU in the past by ignorance and had the same problem with my old 9600XT I just build the system in the case and PSU that came with it and couldn't play a game for more than 20 min, after the PSU died buy a new one and thought a 400W any brand will do it, and yes I finally played some games, but with some others will lockup or just show some bad gphx, then I learned about the 12V rail and this PSU got only 14a on it, upgrade to Antec 500W 12v 20a and problem solved. Also let us know your MOBO and CPU, this plays a big role in gaming matters.