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Recommended PSU for SLI 580's - Page 2

post #11 of 41
Thread Starter 
According to Hardware Secrets it can pull 1000W, possibly more. Looks like I'll go with the Seasonic X850.
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post #12 of 41
    
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post #13 of 41
I'd get the 1k watt just to be on the safe side :-)
http://www.newegg.com/Product/Produc...-007-_-Product

Or if on a little budget
http://www.newegg.com/Product/Produc...-012-_-Product
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post #14 of 41


If you run the core at 855 MHz like the SOC, an 850 W PSU should still be fine. Of course you can get a 1 kW PSU if you want.
post #15 of 41
SLI 580's would run on a quality 750W but you'd have no headroom and probably wouldn't want to run Furmark and IBT at the same time. So, if you get a quality 850W it is plenty for all your other hardware and overclocking needs. Really an AX850 or X-850 is ideal for that configuration.
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post #16 of 41
post #17 of 41
Depending on your configuration, I still don't see an 850 watt being a good idea...

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

Put your details in and hit the calculate button.

You don't want you 850 watter pushing over 850 even if it's capable of it, you are just asking for problems. Get 1000 watts and you can upgrade components easily in the future. I don't believe in getting just enough, I did that once and a year later I needed to buy a new PSU. Waste of money.
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post #18 of 41
1200W that way you can run MAX OC with peliers
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post #19 of 41
Quote:
Originally Posted by Final Version View Post
I seriously doubt that any 850W PSU would survive 2 overclocked 580's.
Quote:
Originally Posted by Turk View Post
You need @ least a 1000 W psu brah.
850w is more than enough for two overclocked GTX 580's.
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post #20 of 41
Ok - found this thread discussing my next question. Instead of posting new thread I'll ask here.

I'm about to SLI a second GTX 580 SC myself. I've got CM V6 GT CPU fan w/led, GSkill dual RAM fan w/led, two 200mm CM fans w/led, one Promiltech 140mm fan w/led, and one normal CM 120mm fan without led. I also run one HDD, one blu-ray optical drive and two cold cathode lights.

So as you can see all my fans are led drawing a bit more power I'll assume. I have an Intel i7 950 CPU over clocked to 3.8Ghz and will reach 4.0Ghz eventually. I'm hoping to OC my cards 12% which is 15% OC than a vanilla GTX 580 specs.

I've currently own a BFG EX 1000 (second revision) PSU and reading many conflicting things about how much Watts are required and or the qaulity of my PSU not being as good as a Corsair AX850.

Will I be able to run my system and not reach over the 80% mark? I don't want to run my 1000 watts past 800-850. Should I get another PSU and if I do have to which 1200 watt PSU is better.....Antec, Corsair, Seasonic? If I absolutely must get another one that has low ripple.

Lastly what is better to run these two cards on... a single 12v rail or multiple? Please be specific and I truly would appreciate it.

These two cards are maxing me out and $1000 is a lot of cash to spend. Buying another component like a PSU might deter me completely but if it's going to hurt me then I'd like to know honestly what you guys think.

Thanks in advance.
     
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