Corsair AX650, is the right PSU for me?

Stijn

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Oct 7, 2011
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I'm configure myself a new computer with a CPU i7-2600k and AUSS ENGTX 580 with 2 hard drives.
This pc will be used for reading mails but also for gaming.
I readed this article http://www.tomshardware.com/reviews/power-supply-psu-review,2916-3.html , which was very interesting, but now I would like to know that the PSU I choosed is the right one.
I want to go for the PSU Corsair Gold AX650 http://www.corsair.com/power-supply-units/professional-series-gold-power-supply-units/professional-series-gold-ax650-80-plus-gold-certified-fully-modular-power-supply.html .

I don't see immiadtly how I can calculate the effciency of this PSU to see this the right one. Can someone help me out?