R9 280 in a Raven RVZ01

I'm building a pc for my friend and I'm going to use an R9 280 XFX and I was wondering if the SFX 450W sufficient or if I need to buy the 600w version instead.

a 450w should be fine. if you don't go nuts with the overclocking. however I'd really would recommend the 600w. so you have a little headroom and you'll be able to use any SINGLE gpu configuration with no issues.

should be fine SFX is good ☺

MY OC'ed 280x (and 4430 and several hdds) don't pull more than ~300 out of the wall. You should be perfectly fine with 450W. I like the overhead of 600W and the possibility of adding a second or more power hungry card if needed, but you should be completely safe with 450W, promise (so long as it has the connectors and amps necessary).

Thanks everyone.