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you CAN run gtx 480's and an OC'd proccessor on an HX850! - Page 5

post #41 of 77
TwoCables you answered my question about 480's folding.So short of folding the 850 will work.I personally like a bit of overkill when it comes to psu's but in this case the 850 is good.
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post #42 of 77
see yes a 850W psu would be fine, but the issue with the HX series is that they have poor Ripple supression so there not rly the best PSU out there...
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post #43 of 77
Quote:
Originally Posted by Havokr505 View Post
see yes a 850W psu would be fine, but the issue with the HX series is that they have poor Ripple supression so there not rly the best PSU out there...
Poor ripple suppression? That's the first time I've ever seen anyone on here say that about the HX850 (or any of the units in the HX Series for that matter).
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post #44 of 77
Quote:
Originally Posted by SmasherBasher View Post
I'm tired of seeing people say that PSU can't SLI 480s.
Agreed. The HX850 is one hell of a beastly PSU. same with the TX650.
 
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post #45 of 77
Quote:
Originally Posted by Havokr505 View Post
see yes a 850W psu would be fine, but the issue with the HX series is that they have poor Ripple supression so there not rly the best PSU out there...
Quote:
Originally Posted by jonny guru
Ripple? What ripple? I don't see no ripple here.
http://www.jonnyguru.com/modules.php...print&reid=153
 
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post #46 of 77
I know this is kind of OT but I have ran 2 570s and a 480 with my x3 1000 and my i5 at 4.3. My psu only has 70a and it worked fine.
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post #47 of 77
Quote:
Originally Posted by TwoCables View Post
That's 668W from the wall. If I assume 85% efficiency, then that would mean the system pulled about 568W from the power supply. If I factor in about 150W for everything else in the system, then that would be close to 720W being pulled from the PSU under the most extreme loads.

So an extremely high quality 650W might be fine (I personally wouldn't try it), but a high quality 750W is the best choice to power a system with two GTX 480s in it while a quality 850W unit is even better.

For example, knoxy_14 is correct: the SeaSonic X-750 would be fine.
First TwoCables let me say I appreciate all the info you provide both in this thread and all throughout the forum. I was wondering what you think about me being able to add another 580 Lightning safely on my x750. I kinda figured it would be okay because of how my CPU is such a power miser, but just curious as to your opinion on the matter. My relevant info is CPU will be at a maximum volt of 1.34v, two 580 Lightnings at 1.15v, two HDDs and about 6 fans, and I would be folding 24/7 on all three. I have searched and seen people chime in (yourself included) but most of the time they just recommend an 850w because the person will be buying new anyway but since I already have it what do you think? This question is mostly driven by curiosity at this point because I would have to find a great deal on another Lightning to get it. I would still like to know, though because you never know how cheap the 580 Lightning could get once Kepler hits, and if I knew I needed an 850w then I could just keep my eye out for a deal between now and then. Thanks for your opinion/advice it will be much appreciated.
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post #48 of 77
Well, let me just say that I consider a GOOD 850W unit to be the bare minimum for OV/OC'd SLI 480's + an OC'd i7.

Both Grunion and I have seen what kinda juice those cards can pull when you start cranking up the volts and clocks on them. The things are no joke.

A good 750W unit is adequate for an OC'd proc and stock 480's, but it will run into trouble with any significant OC'ing on the cards, esp. if you try to stress test both the CPU and GPU's at the same time.
    
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post #49 of 77
Quote:
Originally Posted by juano View Post
First TwoCables let me say I appreciate all the info you provide both in this thread and all throughout the forum. I was wondering what you think about me being able to add another 580 Lightning safely on my x750. I kinda figured it would be okay because of how my CPU is such a power miser, but just curious as to your opinion on the matter. My relevant info is CPU will be at a maximum volt of 1.34v, two 580 Lightnings at 1.15v, two HDDs and about 6 fans, and I would be folding 24/7 on all three. I have searched and seen people chime in (yourself included) but most of the time they just recommend an 850w because the person will be buying new anyway but since I already have it what do you think? This question is mostly driven by curiosity at this point because I would have to find a great deal on another Lightning to get it. I would still like to know, though because you never know how cheap the 580 Lightning could get once Kepler hits, and if I knew I needed an 850w then I could just keep my eye out for a deal between now and then. Thanks for your opinion/advice it will be much appreciated.
I have to admit that I'm not sure. I mean NVIDIA recommends a 600W power supply to power a system with one, so a quality 750W should be enough. However am I correct to be remembering that the Lightning version says it requires a 700W power supply for a system with just one Lightning 580 in it? I mean if I'm remembering correctly here, then that would mean that even the X-750 would be cutting it close.

So I think it depends on that.
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post #50 of 77
My HX850 has been holding up for 9 months now. But I cheated cuz I asked here before I bought it. As far as limboing psu's Hodgoes ran his 480's at 800 on a 750HX for a long time.

Quote:
Originally Posted by brettjv View Post
A good 750W unit is adequate for an OC'd proc and stock 480's, but it will run into trouble with any significant OC'ing on the cards, esp. if you try to stress test both the CPU and GPU's at the same time.
When the voltage is up on the 480's they will really eat the juice. And most times when people run Furmark they aren't running Prime at the same time. We've seen vids of what happens then...
Edited by Draygonn - 6/6/11 at 5:03am
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