$500 Build PSU Question

FrozenC0re

Honorable
Oct 30, 2012
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10,530
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD Phenom II X4 955 Black 3.2GHz Quad-Core Processor ($82.99 @ SuperBiiz)
Motherboard: ASRock 880GM-LE FX Micro ATX AM3+ Motherboard ($59.99 @ Amazon)
Memory: G.Skill Sniper 8GB (2 x 4GB) DDR3-1600 Memory ($38.99 @ Newegg)
Storage: Western Digital Caviar Blue 500GB 3.5" 7200RPM Internal Hard Drive ($57.99 @ SuperBiiz)
Video Card: XFX Radeon HD 7850 1GB Video Card ($183.43 @ NCIX US)
Case: NZXT Gamma Classic (Black) ATX Mid Tower Case ($34.99 @ Amazon)
Power Supply: Raidmax 630W ATX12V / EPS12V Power Supply ($38.98 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($17.99 @ Newegg)
Total: $515.35
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2012-12-12 13:31 EST-0500)

These are my current parts, that i have already ordered and have been delivered, but from things i've heard about the raidmax psu, i'm sending it back and getting another. Is the Corsair CX500 enough for this build (the website estimates 340W), and will it, in the future run a gtx 670? I am also looking at the cx600, but as its $20 more expensive, i would prefer to save money if possible.
 

FrozenC0re

Honorable
Oct 30, 2012
31
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10,530
So the XFX would be the top tier in that price range, but is the corsair cx500 still a good choice, or should i pick something else, i'm not sure the $20 increase is worth it if they are both reliable.