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Best PSU for SLI'ed Twin Frozr II 560 TIs

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March 8, 2012 3:15:48 PM

Hiya all, I have future plans (if I ever get a job :(  _) of getting another 560 ti and hooking up my rig with SLI, my question is what would be the best PSU to purchase (if I even need to purchase one) for my system and thinking of future upgrade headroom.

Here is my rig right now:

Case: Haf 912
Mobo: Asus p67 Extreme 4!
Cpu: 1155 I5-2500k
Memory: 2x4gb corsair vengeance
HDD: 1 7200 rpm 1tb black caviar wd
SSD: 1 64 gb m4
Fans: 6 (4 high power)
PSU: XFX 650 W 80-plus bronze

That's about all the relevant data I can think of for now, but let me know if you need anything else and thanks in advance for helping me out!
a b U Graphics card
March 8, 2012 3:27:34 PM

You should be ok with the one your currently have. As long as its not OC CPU and don't plan on adding more drivers or anything you should be safe. But might i recommend just looking at a Kepler card they will be pretty epic. Also the starting card will be around 139$ which is cheaper than a GTX 560 ti, and probably double the performance of a 560 ti
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March 8, 2012 3:33:25 PM

do you have any links about those kepler cards you mentioned? I've been kind of keeping tabs on them but, to be honest, I'm tired of trying to keep up with GPU marketing..
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a b U Graphics card
March 8, 2012 3:48:55 PM

Also If you want to be more safe a Corsair TX 750 will be perfect
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March 8, 2012 4:55:10 PM

thanks man! yeah that kepler looks sexy as all hell. I'm still gonna stick with my 560 ti for now though, i just bought it like 2 months ago :p 
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a b U Graphics card
March 8, 2012 5:49:25 PM

yea Stick with it. If you can get Kepler. Get Kepler. Its still affordable because i guarantee you. Any of the Kepler cards are gonna be better than that GTX 560 ti
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March 8, 2012 5:57:58 PM

I believe you, I watched all the demos and have been kinda following the cards themselves - what's the big benefit of the kepler models anyways? It seems like much more CUDA cores but what else?
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a b U Graphics card
March 8, 2012 6:12:04 PM

Rockdpm said:
Also If you want to be more safe a Corsair TX 750 will be perfect


I think once you spend money on PSU you better get one with more wattage. Let's say your entire overclocked and SLI system is draining 550W. You have 650W PSU that is working hard at 85% Now imagine 1000W PSU will work at 55%...that means better efficiency and less heat.
So I believe that it is better to have 1000W PSU working at 55% than have 650W working at 85%
I know you may say it is overkill but it makes sense doesn't it.

It would be cool to see some benches at what workload are the PSU most efficient.
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a c 229 U Graphics card
March 8, 2012 6:21:28 PM

If you are going to run those 560 Ti's at the "outta the box" factory overclocked speeds a 750 watter will do just fine.

If you are going to try and crank them up and OC them as far as you can, then I'd suggest two things:

1. Be careful with the OC. The Frozr, unlike the Hawk and Lightning only has a 6 phase VRM ... that's beefier than the reference 4 phase design, but not up tot he level of the MSI Hawk, Asus DC II TOP etc. I'd limit my OC's to 20% or so.....980 Mhz.

2. With both cards cranked near 1000Mhz and a 2500k at 4.5 Ghz or above, I'd want an 850 watter for voltage stability.

First Choices (10.0 jonnyguru performance rating):

Antec CP-850 (requires compatible Antec case)
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
$115 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Antec SG-850
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
$250 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Corsair HX850
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
$160 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

XFX Black Edition
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...

Second Choices (9.5 jonnyguru performance rating):

Antec TPQ-850
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
$130 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Antec HCG-900
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
$140 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Corsair TX V2
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
$125 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Corsai AX-850
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
$170 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

XFX Core Edition 850
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
$120 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Seasonic MD12 850
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...


NZXT Hale90
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
$180 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Third Choices (9.0 jonnyguru performance rating)

Antec HCP-850
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...

Enermax Revolution 85+
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...

Others

Toughpower XT 850 (8.5)
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...

OCZ Z Series 850 (8.5)
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...

Silverstone Element ST85EF (6.0)
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
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a b U Graphics card
March 9, 2012 12:22:17 PM

maxinexus said:
I think once you spend money on PSU you better get one with more wattage. Let's say your entire overclocked and SLI system is draining 550W. You have 650W PSU that is working hard at 85% Now imagine 1000W PSU will work at 55%...that means better efficiency and less heat.
So I believe that it is better to have 1000W PSU working at 55% than have 650W working at 85%
I know you may say it is overkill but it makes sense doesn't it.

It would be cool to see some benches at what workload are the PSU most efficient.

I don't know if your agreeing with me because i said 750 watt instead of 650. But if your suggesting for him to get a 1000 watt power supply, your completely insane. I have been running two GTX 560 ti's off a Brand New 750 watt TX from corsair. Also Mouse Monkey has been doing it off a 5-6 year old 620 watt Power Supply. Now i don't recommend doing it on a 620 or 650 because as your said, everything is more stable with the more head room you have. But 1000 watts is completely unnecessary. Unless your gonna be doing 4 way on GTX 560 448 cores or 3 way 570's you don't need that big of a power bill.... But if you are agreeing with me, good to know you completely understand it!
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