How much wattage will my PC need?

I am in the process of building a computer, and need some insight on how much wattage I will need. I have used online calculators to give an estimate on wattage, but they all give different amounts. I want to make sure I purchase a PSU with enough wattage, but don't want to buy one with so much that I end up spending more money than I need to. My components are:
CPU: AMD Phenom II x4 965 Black Edition 3.4 ghz
Motherboard: MSI 970A-G46 AMD 970 AM3+
RAM: Corsair Vengence 8gb (2 x 4gb)
HDD: Western Digital 1TB 64mb 7200rpm Blue
Graphics Card: ASUS Radeon HD 7750 1gb 128-Bit GDDR5
Case: Rosewill Challenger
Optical Drive: ASUS DVD Burner

I planned on at least 600w, but would like insight.

So, how much wattage do I need?
3 answers Last reply
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  1. http://www.newegg.com/Product/Product.aspx?Item=N82E16817207013

    XFX Core Edition PRO550W (P1-550S-XXB9) 550W ATX12V 2.2 & ESP12V 2.91 SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Active PFC Power Supply


    JonnyGuru.com Recommended & KitGuru.com Award Winner

    $69.99
  2. SR-71 Blackbird said:
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817207013

    XFX Core Edition PRO550W (P1-550S-XXB9) 550W ATX12V 2.2 & ESP12V 2.91 SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Active PFC Power Supply


    JonnyGuru.com Recommended & KitGuru.com Award Winner

    $69.99


    So 550w is all that my build should need? It looks like a promising power suppky, but if i can finda better or cheaper one that would be better.
  3. Get that one ^ It's a seasonic

    Here are some cheaper ones that will work.


    PCPartPicker part list / Price breakdown by merchant / Benchmarks

    Power Supply: Enermax 450W ATX12V Power Supply ($34.99 @ Newegg)
    Total: $34.99
    (Prices include shipping, taxes, and discounts when available.)
    (Generated by PCPartPicker 2013-08-06 18:36 EDT-0400)


    PCPartPicker part list / Price breakdown by merchant / Benchmarks

    Power Supply: Corsair CX 430W 80 PLUS Bronze Certified ATX12V Power Supply ($29.99 @ Newegg)
    Total: $29.99
    (Prices include shipping, taxes, and discounts when available.)
    (Generated by PCPartPicker 2013-08-06 18:37 EDT-0400)
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