Need help finding a power supply

i don't know how to tell what kind of power supply i need.

this is my PC:

here are power supplies:

just got a new graphics card. it recommends a 400+ W power supply, i currently have a 250W. so i guess i'm just looking for a 400+w power supply compatible with my PC, i'm not sure of different types or brands. don't want to act like i know what i'm doing and order the wrong thing. thanks for any help.
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More about need finding power supply
  1. Best answer
    The best deal out there right now is the Corsair CX500 for $29.99 after discount and MIR; great deal.

  2. Listen to rugger, cuz that is a good psu and a great price.
  3. Best answer selected by afew88.
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