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580 questions. Update Pulled the Trigger. - Page 2

post #11 of 23
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sweet it is clocked to 3.8 so if you say I'm golden thats great. May have to bump it to 4 just to be sure and cause I can.
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League overkill
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post #12 of 23
you should be fine, but you can always test it yourself when you get the cards installed.

I had a 920 and 3 5850s and hardly run different between 3.4 and 4.2Ghz... I also used to put up better marks and higher frames then two 580s.
post #13 of 23
Quote:
Originally Posted by nickbaldwin86 View Post
Is your CPU stock? if you are OCed around 3.8-4.2 you will be fine, even at stock you shouldn't have a issue... the 930 is a great chip.

btw I run a zr30w and I have one 580 1.5GB stock clocked and run BF3 without issues.... it isn't maxed out but if you do a little research and look at the difference between the 3GB and 1.5GB cards you will see that the 3GB cards are a waste.

better off just getting 2 1.5 and saving the cash...
but that is up to you and your wallet
Couldn't disagree more, with two 580s in SLI you have way more GPU processing power than you have VRAM to play with it with. With 3Gb of VRAM you will be able to utilize all the GPU processing power available and get the most the cards can provide, rather than have to compromise on settings because of VRAM.
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post #14 of 23
Quote:
Originally Posted by juano View Post
Couldn't disagree more, with two 580s in SLI you have way more GPU processing power than you have VRAM to play with it with. With 3Gb of VRAM you will be able to utilize all the GPU processing power available and get the most the cards can provide, rather than have to compromise on settings because of VRAM.
Ya I am just going off of personal experience and reviews but that is ok
post #15 of 23
Quote:
Originally Posted by juano View Post
Couldn't disagree more, with two 580s in SLI you have way more GPU processing power than you have VRAM to play with it with. With 3Gb of VRAM you will be able to utilize all the GPU processing power available and get the most the cards can provide, rather than have to compromise on settings because of VRAM.
QFT

It's unbelievable how people are willing to go overkill in raw processing power but then they are so conservative with VRAM. It's retarded, what happens once you reach the VRAM wall? Your raw processing power goes to waste because your textures are offloaded to your slower RAM. You would have to be stupid to spend $1000 on two cards that are going to end up crawling when the next games that comes out is going to require more VRAM. Considering that the GTX580 have been out for a while now, if you're buying them now you might as well make sure they're as future proof as possible. What I'm saying applies also to buying one GTX580.
Edited by Emmanuel - 10/3/11 at 8:43am
    
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post #16 of 23
I'd say go with EVGA and the 3GB cards. I was able to get both my EVGA 580s to 945 MHz on the core under water cooling. Mine are the 1.5GB versions though.
post #17 of 23
Agh darnit I just thought of something that I should've looked at sooner, the spacing of your mobo's PCIe slots isn't exactly ideal for the Lightning as it may have trouble intaking air sandwiched together like that. But worst case scenario if the temps aren't ideal I would run the second one in your bottom PCIe slot, your case should be able to accommodate it hanging off down there. It will have space for the actual card but check to see if there is a gap to allow for the DVI port on the bottom slot of the card to stick out. I'm pretty sure it should work without a problem in your bottom PCIe slot, it would run at x16/x8 but that's no problem at all. They might even be fine for you in your first two PCIe slots but if they are too hot then the bottom slot should be fine.
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post #18 of 23
Yeah good point, fitting lightnings is a pain. The fans stick out a bit and invade the nearby expansion slot. If you have two of these cards right next to each other, you're going to have to pull the top GPU up as much as you can and the bottom GPU down as much as you can. By pulling I mean not having the cards sit exactly straight, having them angled to create a clearance between the top card's fans and the bottom card's PCB or else you'll hear rattling. I love my Lightnings but I think MSI could have lived with making the card a little thinner. Anyway the point of the thread was more 1.5GB vs 3GB, I hope we convinced you
    
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post #19 of 23
For about 60 quid extra i'ld take the extra memory to ensure future proofing.

Textures are getting higher and higher res.
That's in addition to fan made projects.

Side question:
How does VRAM work in an sli setup? If you have 2 3gb cards does that add up to 6gb usable?
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post #20 of 23
No VRAM doesn't add up even though manufacturers try to make you think that with misleading advertising. For example they call the GTX590 (dual 1.5GB GTX580) a 3GB card even though it can only store 1.5GB of unique information.
    
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