i don't know much about AMD products but i think that PSU is a bit low in terms of wattage, i have a 500W thermaltake PSU with an i7 and a GTX 660 so my advice get around a 600W+ PSU, great for the future upgades as well, with me im planning on upgrading the GPU but i need to upgrade the PSU first so if ur not planning on upgrading for a while go for it.
*EDIT* i checked the GeForce website and it says minimum sys power requirement is 300W, i think i was high when i wrote that last part, but still keep in mind the future upgrades you might want to do