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3GB GTX 580 or 1.5GB sufficient on U3011 2560x1600 maxxing AA whenever possible? - Page 2

post #11 of 102
Quote:
Originally Posted by Versa View Post
1.5 GB, ROPs are defining for AA and resolution for VRAM.
The 3GB is definately better if you go 3x 30'
3 of those monitors is just insane! A few games at that resolution can bring down any current GPU to its knees.

The following chart is at 4800x2560 resolution with a 3GB 580 in SLI tested by our very own member: Vega.


Edited by youra6 - 4/19/11 at 10:40am
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post #12 of 102
Honestly I think the 1.5GB model is definitely enough vram for a 30" monitor size in 99% of cases. I'd only get the 3GB version if I was getting two (or more) of them in order to run 3 monitors off of.

The 6970 is also very worthy of consideration though. It does VERY well compared to the 580 at 30" resolution, and is significantly cheaper in most locales.
    
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post #13 of 102
sorry about thread jacking but is 1GB enough to max out games at 1200x1920 with max AA

or would it be wise to buy a 2GB model or get a card with more VRAM than 1GB
    
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post #14 of 102
Quote:
Originally Posted by vipergod2000 View Post
Thanks for that info. Not to disregard your proof/experience, but the vram usage of metro on my gtx 570 1280mb raised my concerns on this. I mean, like you said the 3GB per card will definitely be useful in the multi monitor (i.e. 3x 30inch) setups, but that fact remains that the vram usage which I've seen running metro at 1080p already reached 1.1GB.

Thanks for the contributions everyone! I'm sure by accumulating more user experiences, it might help me and those within the same dilemma.

And Mafia, I'm not disregarding your post, its just like my Dad taught me = The two quickest ways to failure are (i) Taking one persons advice ; (ii) Taking everybody's advice....... so i'm trying to find somewhere in between haha!
I've tested on a single 30" Metro with 4x AA reaching 2GB. 1.5GB will not cut it, especially for future games with high image quality.
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post #15 of 102
Quote:
Originally Posted by Mafia2020 View Post
You are in the same exact spot I was one month ago.
I, as well wondered about vRAM issues and wheter 2x GTX 580 would have been enough to max out my 30", but after pages and pages of reading (some supporting the 3GB is the minimum and others supporting the 1.5GB is more than enough) I opted for 2x GTX 580 SLI (1.5 GB) and found out that with such setup you can max everything at 2560x1600 in 99% of games, apart from Dragon Age 2 which has a bug in the current drivers which pushes FPS down to 30 even with my setup, vRAM though is not an issue, since even the buggy DA2 can't max my 1.5 GB out.
Really? That's surprising because DA2 seems to be the most VRAM hungry game I own. It has pushed me over 1.5GB VRAM usage @ just 1440p w/4xAA. What settings are you using?
post #16 of 102
Quote:
Originally Posted by Mafia2020 View Post
@Chris Ihao: Unfortunately it isn't fixed in the latest drivers and it's still an open issue.
@Versa: Viper stated clearly he doesn't intend to multi-monitor. Anyways, out of curiosity, wasn't a single GTX 580 enough to max out your 24"?
Surely you didn't read what I say or misread what I have said. 1.5GB was for him a 3GB is for 3x 1600p.

No, some games I play aren't forunate to push 60+ with AA. AA benefits from SLI/TRI/QUAD for the increase power. Resolution needs the VRAM from the first card since VRAM on 2+ card isn't used.

1.5 VRAM is just enough (for me) for 1920x1200.

Edit: Vega, your my (PC) hero
Edited by Versa - 4/19/11 at 2:17pm
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post #17 of 102
Quote:
Originally Posted by Versa View Post
Surely you didn't read what I say or misread what I have said. 1.5GB was for him a 3GB is for 3x 1600p.

No, some games I play aren't forunate to push 60+ with AA. AA benefits from SLI/TRI/QUAD for the increase power. Resolution needs the VRAM from the first card since VRAM on 2+ card isn't used.

1.5 VRAM is just enough (for me) for 1920x1200.

Edit: Vega, your my (PC) hero
does this mean you could buy one 3GB model and put it into the first PCI-e lane and put another stock normal GTX580?
    
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post #18 of 102
Quote:
Originally Posted by BKsMassive View Post
does this mean you could buy one 3GB model and put it into the first PCI-e lane and put another stock normal GTX580?
No, data is mirrored across each GPU's VRAM, so you would need two 3GB cards to make use of the 3GB framebuffer in SLI.
post #19 of 102
Since this thread is till going, IT really depends on the game you play, Crysis with some AA, Metro2033, high end Oblivion mods, maybe GTAIV with the new shadows patch, and DA2 with the HQ texture pack installed, definitely can give you some VRAM limitation. Majority of other titles probably will not.

Both of these games are @ 5760x1080 (max in game settings) Crysis has 0xAA.


Devil May Cry 4 has 16xCQAA and max settings.


The reason the frame rate is low in Crysis and indeed lower in Devil May Cry 4 than what Afterburner is reading (by about 30fps) is because I have two applications recording screenshots at the same time. My PNG files uncompressed from MSI Burner are too high to upload. Steam takes compressed JPGs, and when they both go off at the same time, the second image taken has lower FPS, which is usually the STEAM one.

Crysis is about 10fps higher, and DMC4 is hard to tell, usually around 200fps.

For 1920x1080 resolution, nothing comes close to using all 1.5GB except maybe DA2 and that I suspect will be refined with nVidia driver optimizations. I personally believe that at 1600 resolution, you will be closer to the 1.5GB barrier when using 4x/8x/16xAA. I believe most titles would run perfectly adequate at 2xAA, like I said and have shown it depends on the game you are playing.

Now all that being said, if I was going with a completely new setup, I don't see 3GB as necessary, but I would choose a 3GB model over a 1.5GB model. These cards are the type of cards you could keep for a generation or two and still be running games great and no matter how you spin it, 3GB is more future proof than 1.5GB. Just the way it is.

Here is the infamous Metro2033, all settings maxed, 5760x1080xAAA vs 1920x1080x4AA vs 1920x1080xAAA, check out the memory usage. You would be surprised.





Edited by RagingCain - 4/19/11 at 4:40pm
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post #20 of 102
Quote:
Originally Posted by vipergod2000 View Post
If I were to go for this decision within the next couple months, I want to know if going for a Palit/Gainward GTX 580 3GB is a no brainer decision to go for, or whether it's overkill when I pick up my U3011.

Any contribution appreciated!
In addition to Palit and Gainward having a 3GB model, Inno3D have also released and is selling their 3GB version. EVGA is also releasing theirs in this week, IIRC. And Zotac is also releasing 2 versions (with reference and non reference cooling solutions. Pic below shows non reference cooling).

So, if your buying time frame is the next couple months, you will have more choices.

Inno3D pics: (post #4)
http://www.overclock.net/nvidia/9797...-benchies.html

Edited by windfire - 4/19/11 at 5:03pm
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