What PSU Wattage?

Hi, I am going to build a new PC but I am not sure if 400w is enought, I am planning on getting the corsair but as I am on a tight budget I want to make sure 400w is enough, here are the specs:

Case - Antec 300 with the stock fans maybe 2 extra ones later
PSU - Will Corsair 400W be ok??
Hard Drive - Western Digital 3.5" SATA II 250/320 GB 7200rpm 16mb
DVD ROM - Samsung DVD±RW Writer
Motherboard - Gigabyte GA-H55M-USB3
CPU - Intel i5 650
Memory - Corsair/Kingston/Crucial/OCZ 4GB (2x2GB) DDR3 1333MHz
Graphics Card - nVidia GeForce 8800 256Mb
Card Reader
Fan Controller

thanks guys
3 answers Last reply
More about what wattage
  1. Here a tool on how to calculate your load use it

  2. 400w would be minimum 500-600w would be ideal and you don't have to spend alot to get a decent one.
    Note the OZC's are modular which is nice for cable management.
    The NEO isn't modular and doesn't ship with a power cord(just use your old one)
    You don't need one this powerful but the price is awesome.
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    Our Price: $56.86 USD
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  3. 400 watt Corsair unit is more then plenty for your system You could run that system on lesser if you needed , but I wouldn't go under 400 watt. Whatever you do dont get suckered into to those cheap units rated for big power because you will be lucky to get half the power it says it has.

    Antec Corsair, OCZ...
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