How to know what power supplu suits my motherboard?

Dear,
My motherboard  is intel dx58so, http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-dx58so.html, i want to purchase a power supply for it, any idea?
hassanayoub85Asked:
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Joshua GrantomSenior Systems AdministratorCommented:
The power requirements also depend on your processor, what kind of graphics card you are going to use and how many, also depends on how many hard drives you will be using also.

Can you list your build out?
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hassanayoub85Author Commented:
Cpu i7 extreme
Vga gts 250 nvidia
2 ssds 120gb
1 hdd 2 tb
Thats all
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Joshua GrantomSenior Systems AdministratorCommented:
750w atx12v version 2.0 minimum with a 6 pin and 4 pin.

Here is a modular one to reduce clutter.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817341041
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hassanayoub85Author Commented:
Cant i lower the watt? It is neccessary to have 750whatt power supply?
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Joshua GrantomSenior Systems AdministratorCommented:
You may be able to go down to a 650 but the graphics card you have listed will use 75 to 125 watts with a max of 150 watts depending on what you are using it for.

http://www.geforce.com/hardware/desktop-gpus/geforce-gts250/specifications

Core i7 Extreme is between 70 and 130 watts depending on load.

And the board itself between 140 and 300

http://www.tomshardware.com/reviews/core-i7-3970x-sandy-bridge-e-benchmark,3348-14.html

I would rather have a little too much and not use it than be underpowered.

Not to mention HDD, SSD, cooling fans, USB accessories, CD-ROM, etc...
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Kyle AbrahamsSenior .Net DeveloperCommented:
Just to add the power supply only draws what it needs to.  I'm running a 1KW power supply at home as I intend to expand it later.  The last thing you want to do is buy one now and then find out you have to buy one again later.
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nobusCommented:
i suggest to use the power supply calculater -it will tell you exactly the minimum need -  then allow for a 50 or 100 W margin for future expansions -  and don't  forget EXTERNAL decvices!
http://extreme.outervision.com/psucalculatorlite.jsp
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nobusCommented:
hassan, tell us please which PS you have choosen??
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hassanayoub85Author Commented:
I choosen a 700w PS
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