PSU Help

Hey guys, very low knowledge pc user here. So I've run into a bit of trouble with finding out if my psu can handle the build I'm planning to make. I've tried calculating the wattage my build would run on various sites and it has ranged anywhere between 460-570. I've tried using all the guides offered on this site but most go over my head :( Could anyone tell me if this build is runnable? I already own the case and psu and I have a 1 TB hard drive as well as a bluray/dvdrw ODD and no extra fans installed. Thank you for your time.

PCPartPicker part list:
Price breakdown by merchant:

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($229.99 @ Amazon)
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory ($43.99 @ Newegg)
Video Card: Gigabyte Radeon HD 7870 2GB Video Card ($247.55 @ Newegg)
Case: Cooler Master HAF 912 ATX Mid Tower Case ($49.49 @ SuperBiiz)
Power Supply: SeaSonic 520W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($59.50 @ Newegg)
Total: $630.52
(Prices include shipping and discounts when available.)
(Generated by PCPartPicker 2012-09-07 11:19 EDT-0400)

Edit: Forgot the motherboard =/
4 answers Last reply Best Answer
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  1. Best answer
    Absolutely and that is a great PSU...I use the Seasonic M12II-520 for a system with an HD 6950; quiet, stable power.
  2. Your fine that is a great brand and is capable of powering your build with high OC even.
    As for unreliable PSU calculators I've found this site to be the most accurate.
  3. Moved, seconded, motion passes, "that's a good PSU for you."
  4. Best answer selected by Holychrono.
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