Doubt in choice of SMPS?

the system specification -amd phenom II X6 1100T, asus AMD880G M4A88TD V EVO, amd radeon 6950, Seagate YOU TB ( 6 GB/s), Samsung DVD-Writer.which smps can i use.are usually rating to the smps to become used.since the cost of 500watt smps will be less, may i use 2×500 watt smps intended for energizing my own specification.

I think that has a Phenom II X6 1100T and also Radeon HARLEY-DAVIDSON 6950 a bit more go below 600W.But work with a power offer calculator to measure projected whole draw.

http://antec.outervision.com.