How do you figure out if psu big enough?

Would 600w be enough for my computer build?

http://www.newegg.com/Product/Product.aspx?Item=N82E16817341001


Asus P5Q Pro motherboard

4870 Visontek Video

Quad 6600

500GB 7200 hd

2x dvd-rw

Can i just assume that as long as i have enough connectors (and not using them all) that the psu is big enough? How can i figure out wattage, they don't post how much each device needs to easily add it up?
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  1. speedstar said:

    Can i just assume that as long as i have enough connectors (and not using them all) that the psu is big enough? How can i figure out wattage, they don't post how much each device needs to easily add it up?


    No you cannot assume that. U need to select your power supply according to your hardware. The most important things are that u have more wattage than recommeded by the motherboard and have high AMPs on each rail


    Heres an online power supply calculator

    http://extreme.outervision.com/psucalculatorlite.jsp

    i would recommend that u should always get and extra 50w - 100w more than recomended by the calcualtor


    according to my calculations u require an 800w power supply

    but i assumed the following since it not given

    i assumed that you will be

    be using 4 memory modules
    having a Crossfire system
    1 sata hard disk
    2 additional PCi Cards
    1 80mm fan
    2 120mm fan
    No Overclocking and Watercooling

    Submitting full computer specifications will helps to determing your power supply
  2. This is the setup i was planning on.

    Asus P5Q Pro motherboard

    http://www.newegg.com/Product/Product.aspx?Item=N82E16813131299

    Intel Quad 6600

    http://www.newegg.com/Product/Product.aspx?Item=N82E16819115018

    4870 video (just the one, won't be crossfire, be overkill for me)

    http://www.newegg.com/Product/Product.aspx?Item=N82E16814129113

    Sata HD (maybe 2 for backup later, never crashed a hd before)

    http://www.newegg.com/Product/Product.aspx?Item=N82E16822148288

    Sata DVD-RW x 2 (blue-ray when price is down)

    http://www.newegg.com/Product/Product.aspx?Item=N82E16827106073

    2 memory at 2gb for 4gb

    http://www.newegg.com/Product/Product.aspx?Item=N82E16820227298

    120mm fan on heatsink

    http://www.newegg.com/Product/Product.aspx?Item=N82E16835202007

    2-3 80mm - 120mm case fans.

    Then some usb stuff and pci stuff for wifi and tv turner later.


    That calculator put it about 425w if i did it right. So i'm assuming since i'm not really doing crossfire, the 600w should do be good?
    I'm just trying to keep the total cost down, if i spend $20-50 extra on every part for a little better part then the cost will skyrocket.

    These two had a really good deal on psu so was thinking of the cheaper 600w

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817341001

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817341002


    I never overclock before, (i'm too afraid of frying something, i don't have money to replace stuff). i was thinking of just trying to push the 2.4 to 3.0. I know some people try 3.4 but i don't want to push it. How much watts does that add to it if i bother to try.
  3. 60.357 watts unless you bump the VID to 1.43, then it's 77.01 watts more.



    It's not by watts, you need a solid 12V rail. A Tier 1 or 2 600 watt with 40 amps on the 12v rail will be fine.

    http://www.jonnyguru.com/, A very priofessional respected PSU reviewer. Pick one of his choices.
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