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How many watts do I need? - Page 2

post #11 of 32
Also true :3
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post #12 of 32
Quote:
Originally Posted by g00s3y View Post

I would go with at least an 850W. Here a few good ones I would go with, just my 2cents.gif

CORSAIR Enthusiast Series TX850 V2 - $134.99 non modular

CORSAIR Professional Series Gold AX850 - $199.99 modular

KINGWIN Lazer LZ-850 - $139.99 modular, LED

Exactly. Why waste $100+ when its not needed?

Again, I ran 580 SLI at 850 core (stock volts) with my i5 2500k at 4.8GHZ, 1.47v just fine with my TPN650. Your HX650 is a better unit than my TPN is. It'll do it fine with stock volts on the GPU's.

Sigh, why do people seem to think he needs so much power? It's not like he's running an FX with 480's in SLI, then I could see 850w.
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post #13 of 32
Quote:
Originally Posted by Buzzin92 View Post

Nothing wrong with having a little headroom wink.gif

Yeah, why not buy a 1500W+ PSU and use it FOREVERAR?!??
Ohwait, the world ends in 221 days, 5 hours, 29 minutes and 10 seconds.
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post #14 of 32
Quote:
Originally Posted by bruflot View Post

Quote:
Originally Posted by Buzzin92 View Post

Nothing wrong with having a little headroom wink.gif

Yeah, why not buy a 1500W+ PSU and use it FOREVERAR?!??

A 1500w unit will wind up having about the same lifespan as a 750w will, but cost $100 or more over the top of the 750w. Only reason you'd need 1500w is quad SLI 580's.
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post #15 of 32
Quote:
Originally Posted by bruflot View Post


Yeah, why not buy a 1500W+ PSU and use it FOREVERAR?!??
Ohwait, the world ends in 221 days, 5 hours, 29 minutes and 10 seconds.

http://www.scientificamerican.com/article.cfm?id=nasa-crushes-2012-mayan-apocalypse-claims wink.gif
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post #16 of 32
Quote:
Originally Posted by pioneerisloud View Post

You guys do realize he's on a 95w TDP processor right? I ran GTX 580 SLI just fine on my Antec TPN650w with the GPU's at stock volts and overclocked. I think his current HX650 will do just fine, it might start showing issues with overvolting the cards though. Not a big deal, it'll just shut down...showing him he'll need a new unit. Why waste the money on a new unit if his current one MIGHT just work fine?
Seriously, try it out with your HX650 first. Worst thing that'll happen is that it'll shut off while gaming....and if that happens pull one card and buy a new 750w unit. You do NOT need an 800+w unit for 580 SLI with Sandy Bridge.
Normally I wouldn't argue with this, you're generally right... and if this was a higher end unit I'd say the same thing... but the HX650 is not the kind of unit you want to overload very often... and if he's playing demanding games at hardcore settings(which is why you buy two 580s in the first place) that will happen(since he distinctly mentioned the intention to overclock the cards). smile.gif
post #17 of 32
Thread Starter 
Before I took my old system apart I had my i7 870 @ 4.0 Ghz and my gtx 580 @ 900 core clock. The system was water-cooled, but did not have as many fans as it will have in my new NZXT 810 as I am adding another radiator. I will be getting the i5 2500k and z77 msi gd65 and hope to overclock that to close to 5.0ghz, but the gtx 580 will keep the same overclock. I will most definitely be adding a second gtx 580 and will match the clock and I may add a second pump to my loop. Should I go 850 watt just to be safe?
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post #18 of 32
Quote:
Originally Posted by pioneerisloud View Post

A 1500w unit will wind up having about the same lifespan as a 750w will, but cost $100 or more over the top of the 750w. Only reason you'd need 1500w is quad SLI 580's.

You're right, we need even more power.
We should get one of these to have in our backyard;

397
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post #19 of 32
Quote:
Originally Posted by fa5terba11 View Post

Before I took my old system apart I had my i7 870 @ 4.0 Ghz and my gtx 580 @ 900 core clock. The system was water-cooled, but did not have as many fans as it will have in my new NZXT 810 as I am adding another radiator. I will be getting the i5 2500k and z77 msi gd65 and hope to overclock that to close to 5.0ghz, but the gtx 580 will keep the same overclock. I will most definitely be adding a second gtx 580 and will match the clock and I may add a second pump to my loop. Should I go 850 watt just to be safe?

Since you're going water cooling (you didn't state that), I would definitely suggest an upgrade as you'll be cranking voltages up (thus power requirements) a good bit with water. A good quality 750-850w unit is what you should be after in this situation then. You didn't state water cooling to start with. tongue.gif

Pick any unit in the 750-850 range off this list:
http://www.overclock.net/t/183810/faq-recommended-power-supplies

I'd recommend to steer clear of Corsair, just out of principle myself. Everybody recommends Corsair units, and its getting tiring. We don't need Corsair to take over the PSU market, so I like to recommend the other guys. smile.gif
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post #20 of 32
Quote:
Originally Posted by pioneerisloud View Post

I'd recommend to steer clear of Corsair, just out of principle myself. Everybody recommends Corsair units, and its getting tiring. )
I support this message.
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