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Will Corsair TX850 handle 2 GTX580's

Last response: in Systems
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November 12, 2010 2:07:36 PM

So I'm gonna get a Corsair TX850 PSU, question is "can I use 2 GTX 580's on sli on that PSU or will it be inadequate)

Specs:

i7 950@ 4.0GHZ
Corsair XMS3 6GB 9-9-9-24
EVGA GTX 580 x2
Gigabyte GA-X58-USB3
Cooler Master HAF 922
Western Digital Caviar Black 640 GB
Seagate Barracuda 250GB



Fans: 2x200MM (1x LED)
5x120MM (non LED)

November 12, 2010 2:09:09 PM

It's a close call but I'd bump it up to a 1000w. But why are you cheaping out on bassically everything yet going with dual 580s?
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November 12, 2010 2:12:41 PM

It should, that is a good psu ^agree with above
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November 12, 2010 2:18:11 PM

uhhhhhhhhhhhhhh not doing sli for now just wanna know if I buy the card now card and guess need an upgrade if that psu will support it
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November 12, 2010 2:24:16 PM

In my opinion the 580 is a very very powerful card, when it does end up struggling with games, it would be a better option just to get a new single card.
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November 12, 2010 2:59:40 PM

zooted said:
In my opinion the 580 is a very very powerful card, when it does end up struggling with games, it would be a better option just to get a new single card.



Do you mean I should just get 1 gtx580

Another question will it be better to buy 2 460s than 1 580?
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November 12, 2010 3:02:05 PM

Somebody_007 said:
It's a close call but I'd bump it up to a 1000w. But why are you cheaping out on bassically everything yet going with dual 580s?

Will it just get bottlenecked?
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November 12, 2010 3:04:54 PM

Get rid of that WD and get a Spinpoint F3 1 TB...
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November 12, 2010 3:26:31 PM

For the PSU, check www.slizone.com . 950-1000W should be good, but the verified PSUs should give you a good idea of what will work.

The i7 and the Gigabyte board aren't "cheaping out". That processor should drive one or two 580s just fine. Perhaps somebody_007 was referring to the hard drives and the CAS 9 RAM?
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November 12, 2010 3:44:13 PM

Yeah I was reffering to everything really(not that they are bad quality or anything they are all good choices, but just not high end enough to pair with 2 580s) the cpu(a 950 will definately bottleneck) ,ram, psu(at this price point it really should be modular IMO anyways), The HDDs(old tech and no SSDs), the case is'nt bad but IMO very underkill if you want to house 2 580s and even the mobo if you want to OC to 4.0 I would suggest going with the ud3r or similar http://www.newegg.com/Product/Product.aspx?Item=N82E168... as the usb3 doesn't even support SATAIII. My personal favourite board in this budget range is the sabertooth though http://www.newegg.com/Product/Product.aspx?Item=N82E168...

However seeing as your only going with 1 580 to start with it is much more balanced. However dual 580s will be bottlenecked by a 950 at any clock. 460sli + i7 950 is a better choice. Gives you similar performance to one 580, but leaves you money to go with a btter mobo, CL7-8 ram,spinpoint f3 1tb, modular psu and maybe even a small SSD.

BTW here is a vid showing the i7 quad bottlenecking heavily http://www.youtube.com/user/LinusTechTips#p/u/9/5JovzBG...
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November 12, 2010 3:54:33 PM

Somebody_007 said:
Yeah I was reffering to everything really(not that they are bad quality or anything they are all good choices, but just not high end enough to pair with 2 580s) the cpu(a 950 will definately bottleneck)


Do you have any other evidence aside from a video of the i7-950 bottlenecking 2x 580? I unfortunately don't have time to watch it right now, but it seems sketchy. What resolution was it running at?

Counter-evidence: http://www.anandtech.com/show/4012/nvidias-geforce-gtx-... - Crysis Warhead at 2560x1600 runs at 38.1 fps with one 580, 69.1 fps with 2x 580. Test machine is, I believe, an i7-920/30 running at 3.33 GHz, which is pretty similar to an i7-950.

(Note, I do think that buying the biggest, newest graphics card is not necessarily the best idea from a financial standpoint. I just don't trust youtube videos as the source of technical information and would like to see more evidence of dual-580s being CPU-limited.)
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November 12, 2010 4:21:48 PM

It's running at 2560x1600, but it's not just a youtube video he does reviews and unboxings as a job, but I think it's very very game dependent as you can see here: http://www.overclock3d.net/reviews/gpu_displays/asus_gt... with hawx the average fps is extremly similar(btw he runs a 950 at 4.0 if I remember correctly) whereas with other games it sometimes close to linear scaling.

http://www.bit-tech.net/hardware/cpus/2010/07/19/intel-... also here we see crysis is immediatly gpu bottlenecked(5870 I believe) whereas on terran x3 CPUs defintaly prove to be bottlnecking(and keep in mind dual 580 smashes a 5870 to bits)
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November 12, 2010 5:43:54 PM

Somebody_007 said:
It's running at 2560x1600, but it's not just a youtube video he does reviews and unboxings as a job, but I think it's very very game dependent as you can see here: http://www.overclock3d.net/reviews/gpu_displays/asus_gt... with hawx the average fps is extremly similar(btw he runs a 950 at 4.0 if I remember correctly) whereas with other games it sometimes close to linear scaling.


Scaling implies that there is no bottleneck. With HAWX, I really don't know what to say. The max fps is over 6x the human threshold. The average is about 3.5x, and the minimum is 2x. At that point, it doesn't matter at all. It's much more likely that he's running into a limitation of how to measure fps or some sort of weird testing artifact than anything else.

From the conclusion:
"If single-card is great, SLI leaves us completely breathless." -- that in no way implies bottlenecking of any sort, unless my ability to comprehend English has failed.
"For once the performance in SLI is enough that we'll overlook the wallet emptying price and give the SLI a OC3D Gold Award alongside our OC3D Performance Award."

I'm not sure that 2nd review means what you think it means.

"We patch Crysis to v1.21 and run it in DirectX 10 mode with High detail settings. We use 1,680 x 1,050 with no AA and no AF to give a reasonably real-world test without the risk that the graphics card will be a limiting factor to CPU performance."

As you can see from the charts, performance increased (marginally) as clock speed and processor power increased. The i7-930 improved from 56 to 58 fps, with minimum fps increasing from 30-39. A minor increase to be sure, but that doesn't look like a GPU bottleneck to me.

And from the conclusion:
"There was also very little performance difference between the i7-970 and i7-980X EE in our test games, with neither of these 6-core CPUs proving any faster than the cheaper quad-core processors."
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November 12, 2010 6:26:42 PM

Seems like your right, I think mostly because I assumed that if a faster cpu gives better fps than the gpu is bottlenecking. Seems like that's very wrong though. It looks more like doubling the power of either cpu or gpu can drastically increase performance without really causing any severe bottlenecks. ALthough is still think that for example terran x3 will be bottlenecked to some extend by the cpu, but it looks like far less than i first imagined.

Computers surprise me yet again, anyways thanks for clearing that up.
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November 13, 2010 12:24:26 AM

Wait a little, the new AMD HD 6950 and 6970 are scheduled later this month, last time when AMD launched cards, Nvidia dropped the prices for their corresponding cards.
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November 21, 2010 12:18:43 AM

OK new specs and this time will it run on the TX950 not the TX850 anymore

i7 950 @4.0GHz
ASUS P6X58D-E ( my Thors Hammer fried my USB3)
Corsair XMS3 CAS 9 6GB
Corsair TX 950
2 or 3 GTX 580
Cooler Master HAF 922
Western Digital Caviar Black 1TB 64MB
G Skill Phoenix Pro 60GB SSD
Seagate Barracuda 250GB
Xigmatek Thors hammer (2xfans included with the 3x 120mm fans below)
Liteon DVDRW ROM
3x 120mm fan
2x 200mm fan
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November 21, 2010 6:40:23 AM

you do know that all those extra fans on the thors hammer wont do anything...
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November 21, 2010 10:47:25 AM

mobohobo said:
you do know that all those extra fans on the thors hammer wont do anything...



what I meant is there are only 2 fans on the thors hammer but the 2 fans are included with the number of 120mm fans I stated
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