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Old September 21, 2011, 03:03 PM
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Hey all, I am new to these forums, but spend a lot of my time on other enthusiast sites.

Anyhow, after reading the great review about the EVGA 580 3GB card, I was checking to see if there was a followup that showed how the 3GB performed in SLI or on more than one monitor.

Here is my situation: I currently am running 3 x 580sc overclocked to 900 core under water. I know that EVGA will be releasing the 580 Classified 3GB soon and am wondering if I should invest in the extra Vram. I run on 3 24 inch monitors in 2d surround.
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Old September 21, 2011, 03:05 PM
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I seriously doubt it's worth the hassle. You have plenty of power as is, the difference would be minor.
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Old September 21, 2011, 03:12 PM
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IIRC Arinoth picked up 2x580 3gb cards for his tri monitor setup and was pretty disappointed in the performance. IE the extra vram did little performance wise, ended up selling his after a week and went with 6970 2gb x2.
For right now it seams like 2gb is the sweet spot.
But then again I am only running 2560x1440.
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Old September 23, 2011, 10:15 AM
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I am still torn, as the EVGA 580 Classy was released today. While you guys are likely right, I cannot help but wonder what the difference would be:)

The card has much better OCing capability than the standard 3GB version and the extra VRAM will probably start to shine in the 5760X1080 that I run in.

Last edited by Johnny_Utah; September 23, 2011 at 10:25 AM.
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Old September 23, 2011, 10:28 AM
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Just saw this thread now and from my personal experience I'm going to have to say the 580 3GB are a complete waste of money. I've used several dual card set ups, seeing improvements each time i've gone 470s -> 6870s -> 560 Tis -> 580 3GBs. What I saw with the 580 3GBs is that most if not all games (including crysis 2 on high everything with high rest packs) could never really exceed 2GB vRam at 6000 x 1080 (1920 x 3 + bezel correction). For the premium cost of the extra 1.5GB per card, there was little to no extra gain really seen. I've since switched to 6970s and let me tell you, I get the EXACT same performance as I got with the 580 3GB however spent quite a bit less.

Unless you'll be doing 2500 x 1600 in triple monitor gaming, the 580 3GB are a complete and other marketing gimmick to get more money from customers on the same architecture. I should also note that the 580 3GBs overclocked use a lot more power then the 6970s overclocked.

TL:DR Don't waste money on 580 3GBs unless its 2500 x 1600 resolution gaming, otherwise go with 6970s
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Old September 23, 2011, 10:34 AM
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Arinoth,

Thanks so much for the post. I think I will see if I can get some of the 6970's you suggested.
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Old September 23, 2011, 10:36 AM
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I'm not sure how much an improvement you may see from your 1.5GB 580s compared to the 2GB 6970s, I'm just saying comparing them for a performance per price point for those whom have neither the 6970s win. The only down side of the 6970s are some games don't seem to have options for widescreen gaming *cough* Witcher 2 *cough* when nVidia does, though I've only found one game that has that, and it was the developer whom did it, not the lack of AMD Driver support.
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Old September 24, 2011, 05:37 AM
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Here's some information on VRAM usage that might be of use to you in your decision:

HARDOCP - Conclusion - MSI N580GTX Lightning XE 3GB SLI Video Card Review

In that review, the level of AA possible is the difference between the 1.5, 2, and 3GB cards.

Palit NVIDIA GTX460 in Surround: 1GB vs. 2GB | Widescreen Gaming Forum

That review shows VRAM use with AA at up to 60X12 resolution running a dozen games.

Last edited by The RealRollo; September 24, 2011 at 05:53 AM.
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Old September 24, 2011, 06:07 AM
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I'll have an article up in about a week addressing this. It will include the GTX 570 2.5GB and GTX 580 3GB.
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Old September 24, 2011, 07:04 AM
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Quote:
Originally Posted by The RealRollo View Post
Here's some information on VRAM usage that might be of use to you in your decision:

HARDOCP - Conclusion - MSI N580GTX Lightning XE 3GB SLI Video Card Review

In that review, the level of AA possible is the difference between the 1.5, 2, and 3GB cards.

Palit NVIDIA GTX460 in Surround: 1GB vs. 2GB | Widescreen Gaming Forum

That review shows VRAM use with AA at up to 60X12 resolution running a dozen games.
That HardOCP review is rather misleading and was one of the articles I originally used to jump to the 580 with 3GB.

Also you can't really compare 1GB vs 2GB to 1.5GB to 3GB as most games don't use over 2GB and Crysis 2 was the only one that used 2.15GB. The extra .5GB on the 580s makes it bridge the gap between 1 and 2GB vRam. This was no where near the 3GB cap of the cards and ultimate a waste of money and marketing gimmick.
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