Have you got all the components..? If not then please change the motherboard.. There are better alternatives available.. This one for example -
As for the PSU, check out this combo -
If you are not interested in that combo then Davcon has already sorted out the PSU for you I guess.. I'll recommend this video card though (since you are not interested in SLI ever) -
Thank you Emperus for your suggestions it's really appreciated! Unfortunately I'm buying it in a store and they got sort of deals for their "selected pieces" and I cannot get other brands than the selected ones. But for the graphic card I think I can get a hand on the one you proposed since my actual Pc come from the same store and they sell Asus. By the way whats wrong with the motherboard? Is it too cheap speaking of quality or simply not as functionnal as it could be?