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How do you figure out if psu big enough?

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August 20, 2008 10:27:49 PM

Would 600w be enough for my computer build?

http://www.newegg.com/Product/Product.aspx?Item=N82E168...


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?

More about : figure psu big

August 20, 2008 11:09:35 PM

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
    August 21, 2008 12:28:19 AM

    This is the setup i was planning on.

    Asus P5Q Pro motherboard

    http://www.newegg.com/Product/Product.aspx?Item=N82E168...

    Intel Quad 6600

    http://www.newegg.com/Product/Product.aspx?Item=N82E168...

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

    http://www.newegg.com/Product/Product.aspx?Item=N82E168...

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

    http://www.newegg.com/Product/Product.aspx?Item=N82E168...

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

    http://www.newegg.com/Product/Product.aspx?Item=N82E168...

    2 memory at 2gb for 4gb

    http://www.newegg.com/Product/Product.aspx?Item=N82E168...

    120mm fan on heatsink

    http://www.newegg.com/Product/Product.aspx?Item=N82E168...

    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=N82E168...

    http://www.newegg.com/Product/Product.aspx?Item=N82E168...



    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.

    August 21, 2008 2:17:32 AM

    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.
    Related resources
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