Reviews show that the card all by itself can use 200W loaded. So your going to want a minimum of a 600W PSU. Cooler master does have some good PSU’s but they aren’t considered Hi-end (depends on the model).
Good brands to consider are: Seasonic, Antec, Enermax, Corsair. Honorable mention goes to the brand Sparkle Power.
Remember to get a PSU that is very efficient especially at idle since most PC’s sit idle the majority of the time (web browsing, typing, etc). Platinum PSU’s are still pretty expensive but the Gold rated ones are getting affordable. Use This Site
to see how well they perform (especially at 20% load).
Link to site with power usage tests HERE