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post #11 of 26
The 13 y.o. Flying Donkey is correct ... you only have as much vram capacity as that of the card w/the lowest amount. It doesn't matter which card you put where.

So if you really need more vram (which I find rather hard to believe at 1920x1200 resolution), you'll need to get 2 of the 3GB cards (or 2 x GTX560 2GB).
    
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post #12 of 26
Thread Starter 
Like i said currently at that res games are not debilitated to the level of not playable, i can max out Metro but the current card seems to struggle, i rarely rise above 35-40fps and doesn't feel necessarily as smooth as it seems it could be. From some of the benches i have seen a second 1.5gb 580 would double frames in metro, current games dont have much of a problem but i dont want the same feel on upcoming titles that may more than likely be pretty demanding i.e Skyrim, Rage, BF3 , especially BF3.
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post #13 of 26
I think you should just get another 1.5Gb 580... I'm almost certain this isn't a vram issue
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post #14 of 26
Quote:
Originally Posted by sockpirate View Post
Like i said currently at that res games are not debilitated to the level of not playable, i can max out Metro but the current card seems to struggle, i rarely rise above 35-40fps and doesn't feel necessarily as smooth as it seems it could be.
You're not VRAM limited in Metro at 1200p. I hover between 1.4 and 1.5GB VRAM usage in Metro at 1440p.

Your 580 is struggling because Metro is just a very stressful game. No single card can max it and stay over 60fps atm.
post #15 of 26
Quote:
Originally Posted by Booty Warrior View Post
You're not VRAM limited in Metro at 1200p. I hover between 1.4 and 1.5GB VRAM usage in Metro at 1440p.

Your 580 is struggling because Metro is just a very stressful game. No single card can max it and stay over 60fps atm.
Indeed, even my cards (470 SLI) with their biggest OC's (850/1800) cannot totally max Metro w/o ever dropping below 30fps occasionally.

And at 1920x1200, totally maxed, the game only uses around 1200MB of VRAM.

@OP: Did you know you can monitor vram usage in real-time using the Onscreen Display feature of Afterburner? Very handy tool for all manner of troubleshooting. Unless you are seeing around 1500MB usage, you can be pretty confident that your perf issues aren't vram related.
    
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post #16 of 26
ok with "your" monitor resolution , you dont really need to get 3gb version , unless you intend to do 3d surround , even some of games in 3d surround still playbe with 1.5gb sli , just need to lower AA bit
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post #17 of 26
Thread Starter 
Well when i get out of the game i can see from evga precision that i am at 99-100% GPU usage. I should probably try and set up after burner though to see exactly.

I just wanna be able to max out AA with better performance, i am guessing at my res then a second 1.5gb would be better than a 3gb card? I wont ever be going higher than this res more than likely, i just dont wanna have problems with maxing AA in later titles.

I guess these is good clarification



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Edited by sockpirate - 5/23/11 at 9:54pm
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post #18 of 26
Quote:
Originally Posted by sockpirate View Post
Well when i get out of the game i can see from evga precision that i am at 99-100% GPU usage. I should probably try and set up after burner though to see exactly.

I just wanna be able to max out AA with better performance, i am guessing at my res then a second 1.5gb would be better than a 3gb card? I wont ever be going higher than this res more than likely, i just dont wanna have problems with maxing AA in later titles.

I guess these is good clarification



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yea just get second 1.5gb 580 , you will be good to go with your current res
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post #19 of 26
Also I am not sure about the GTX500 series but certainly the 200 and 400 series where not able to SLI with different VRAM straight out of the box, you have to do a Regedit tweak:

http://www.overclock.net/nvidia/8779...k-windows.html

Thought you might need to know!
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post #20 of 26
Thread Starter 
Alright it seems the best bet would be to go with another 1.5gb 580 since a 3gb card(s) will not be needed for my current res, hopefully that is the case, if not i will just sell both 1.5gb cards and see how things work with 1 3gb card first then possibly a second .
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