I am buliding my first computer it's a ASUS A8N SLI Deluxe, Thermaltake case with multiple fans. I was told I would need at least a 600watt power supply primarily due to the SLI. Any help would be appreciated.
That was exagerated, and has been reduced. A good 450 watt should work fine, if you have two power hungry cards, then a 520 watt for overhead.
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Fan's don't draw much juice, a good 400W power supply would likely be good for your system with a single video card, and something around 500W would be more than enough with dual video cards.
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Fortron Source 500W, Antec True Power 550W should be fine. Enermax makes something between 550 and 600W also. Sparkle Power uses Fortron Source. I'd go for something with a respected name, a 600W unit from an unreliable company will be unreliable in spite of its rating.
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In addition to the solid advice in previous posts, you might want to look at the <A HREF="http://www.newegg.com/Product/Product.asp?Item=N82E16817151024" target="_new"> SEASONIC S12-500 500W Power Supply </A>. Priced right, SLI ready (although not presently NVidia SLI certified), and highly recommended as an 80 Plus Approved unit as all the Seasonic S12 line of PSU's are. Check <A HREF="http://www.silentpcreview.com/article247-page1.html" target="_new"> this review </A> out.
"The world ends when you're dead. As long as your breathing you got more punishment in store. Stand it like a man and give some back."
The PSU's Crahman has suggested are very good choices. I have a Thermatake 680W and its very stable. If you decide to get one this big its a very solid buy.
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