How do you figure out if psu big enough?

[speedstar]

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?

 

[juvealert]

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

 

[speedstar]

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.

 

[Conumdrum]

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.