Which PSU should I get to support my build?

Is the PSU I chose a bit overkill, or do I need a better one? Here is my build. PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i3-3220 3.3GHz Dual-Core Processor ($119.99 @ NCIX US)
Motherboard: ASRock Z75 Pro3 ATX LGA1155 Motherboard ($79.99 @ Newegg)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($55.99 @ NCIX US)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($67.98 @ Outlet PC)
Video Card: Sapphire Radeon HD 7850 2GB Video Card ($184.99 @ Newegg)
Case: Xion XON-980-BK (Black) ATX Mid Tower Case ($59.99 @ Newegg)
Power Supply: Corsair Builder 500W 80 PLUS Bronze Certified ATX12V Power Supply ($49.99 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($16.97 @ Outlet PC)
Keyboard: Microsoft SIDEWINDER X4 Wired Gaming Keyboard ($59.99 @ Amazon)
Mouse: Mionix Naos 3200 Wired Optical Mouse ($47.84 @ Amazon)
Total: $743.72
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-03-25 12:43 EDT-0400)
2 answers Last reply
More about psu support build
  1. No your PSU is fine. Build looks good.

  2. ^ Agreed. Build is very well balanced. Everything is compatible and of good quality. Looks good.
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