Im not an exper in PSU's so i dont know if 450w are enough :x
More aboutwill system
yeah should be
be nice if you had just listed the parts though
saves having to open all those links and remember what they all were
It should be ok, but if you don't have it yet I would go for something a little bigger in wattage, perhaps a 550-600w just for a little bit of head room, especially if you are planning on overclocking.
That psu will do, he doesn't need a 500W psu...for a 650 gtx and a pentium G860. The maximum tdp of the card is 64 W, the cpu doesn't get more than 55W. The total system at load will not draw more than ~150W. Nvidia recommend for it a 400W psu. You're fine with that psu.