My budget is around 850€, everything else costs around 800€, i have also found Corsair CX Series CX450M for the same price, but it is only 450w and the recommended for my build was 400w. Would it be ok? It is my first build btw, i have no idea about power consumption. (I found the 120 gb ssd for just 20€ and i think that 120 gb can fit only windows 10 64bit, right?)No, that psu seems to be low quality. I would look for a better 80+ bronze certified psu.
What is your budget?
Ps, id suggest a 240gb ssd for windows.