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Tri-sli 470 to dual SLI 3gb 580

post #1 of 19
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So I moved to a surround setup on 3 HP 27" HD displays and have been playing around with a lot of the newer games at 6000x1080 bevel corrected resolution, and am starting to see some rather large issues with both frame rates and stability issues when I try and push them at these resolutions.

Trying to find out if there would be a noticeable performance increase going from the 470's 820/1900 to the dual 3gb 580's before I jump in and do all the work of draining/retubing my loop. I know they run cooler to begin with, and would be fewer cards in the loop anyway so that's a benefit, but not sure if it's worth the $1400ish investment.

For the games that are having issues Dirt 3, Witcher 2 using HaYDeN's letterbox mod, WoW, Shogun 2, Crysis 2.
post #2 of 19
3 470s should be faster than 2 580s, however undoubtedly you're vram limited (which means the 580s will perform better at that res). I would actually consider ATI here honestly. Two 580s are pretty awesome, but for $1400 you would probably do better with three unlocked 6950 2GB versions while saving yourself $700.

3GB is overkill, 1.25GB is underkill, 2GB would be enough.
    
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post #3 of 19
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Would the same thing be said for the SLI 590 cards? They claim to have 3gb of video memory each as well, but if split between 4 cards that's only 1.5 gigs of memory per GPU right? So unless they come out with a 6gb/4gb 590 I'm pretty much stuck with unlock 6950's or dual 3gb 580s.
post #4 of 19
Quote:
Originally Posted by BallaTheFeared View Post
3 470s should be faster than 2 580s, however undoubtedly you're vram limited (which means the 580s will perform better at that res). I would actually consider ATI here honestly. Two 580s are pretty awesome, but for $1400 you would probably do better with three unlocked 6950 2GB versions while saving yourself $700.

3GB is overkill, 1.25GB is underkill, 2GB would be enough.
This^ sound advice
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post #5 of 19
Quote:
Originally Posted by garnet1985 View Post
Would the same thing be said for the SLI 590 cards? They claim to have 3gb of video memory each as well, but if split between 4 cards that's only 1.5 gigs of memory per GPU right? So unless they come out with a 6gb/4gb 590 I'm pretty much stuck with unlock 6950's or dual 3gb 580s.
Yep, the 590s have 1.5GB same as reference 580s.

Pretty much, unlocking 6950s may be hard to find now. AMD seems to have curbed that.

You could try used, if you're ok with that. Some cards come with lifetime warranties like mine even though they're used.

Still 3 6970s is only get to net you about $960, and the performance will be greater than 580 SLI I think.

ATI is not without problems though, I just think if you can get past their drivers without any issue you'll get better performance//price with an ATI setup than with 580s currently.
    
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post #6 of 19
Quote:
Originally Posted by BallaTheFeared View Post
Yep, the 590s have 1.5GB same as reference 580s.

Pretty much, unlocking 6950s may be hard to find now. AMD seems to have curbed that.

You could try used, if you're ok with that. Some cards come with lifetime warranties like mine even though they're used.

Still 3 6970s is only get to net you about $960, and the performance will be greater than 580 SLI I think.

ATI is not without problems though, I just think if you can get past their drivers without any issue you'll get better performance//price with an ATI setup than with 580s currently.
Right on spot.

6990 + 6970 will do well too, especially if you don't want three cards in your case. And they beat the crap out of GTX 580 SLI.
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post #7 of 19
I moved from 3x 480 to 2x 580 3GB and although in the single screen benchmarks I see 5% decrease (max OC vs max OC), I see 20-45% improvement in 3D Surround (6000x1080).

F1 2010 benchmark VRAM usage in 3D is >2600MB...
    
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post #8 of 19
Something doesn't add up.

You lost 5% performance going from three 480s to two 580s?
    
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post #9 of 19
Quote:
Originally Posted by BallaTheFeared View Post
Something doesn't add up.

You lost 5% performance going from three 480s to two 580s?
Yes it does add up, and the biggest loss - ~5% - is in benchmarks (3d Mark11 Performance preset) where the tri-sli scaling is best.
580s have more CUDA cores and they OC better, also with 2 I'm in 16/16 and with 3x480s I was in 16/8/8
With 480s I could go 900-880 across 3 cards in tri-sli, with 580 I can go 990-970.

Gains in 3D surround are obvious - VRAM...

EDIT - it gets better - I didn't mention almost 400W less power draw from the socket at the highest OC levels in Vantage...
Edited by luke997 - 5/25/11 at 2:04pm
    
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post #10 of 19
Quote:
Originally Posted by luke997 View Post
Yes it does add up, and the biggest loss - ~5% - is in benchmarks (3d Mark11 Performance preset) where the tri-sli scaling is best.
580s have more CUDA cores and they OC better, also with 2 I'm in 16/16 and with 3x480s I was in 16/8/8
With 480s I could go 900-880 across 3 cards in tri-sli, with 580 I can go 990-970.

Gains in 3D surround are obvious - VRAM...

EDIT - it gets better - I didn't mention almost 400W less power draw from the socket at the highest OC levels in Vantage...
Were the 480's under water?
    
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