Their test system: 105 W, Idle, 377W w/game, Maxed out (runing Furmark) 434W
Bear in mind that is Total Power which includes the +5 and +3.3V Rails.
You will will be close to above power consumption, (maybe slightly less) They used a higher end CPU, But only used a single SSD and No DVD drive and 16 gigs Ram verse your 8 Gigs. Bottom Line, Yes CX600 is fine as long as you do not xfire in the future.
Personally I consider the Corsair (love them) CX line-up as a Mid grade PSU, Thier entry level PSU, and prefer the TX and HX line-up - AX just flat out to expensive. Believe the CS line is a cut above the CX