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A few GTX 680 questions.

post #1 of 18
Thread Starter 
Okay, I just have a few questions. Just to provide some quick info, I'm going with the Intel Core i7 3820 on a R4E and hopefully 3 680s.
1. Will I need to wait for the 4 GB 680 if I wanna play at 5760 x 1080 with no hiccups?
2. Will the AX1200 power 4 GTX 680s?
3. What's a pretty good case for quad-SLI?


Thanks guys. So pumped about the 680 release! smile.gif
     
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post #2 of 18
you can't quad sli 4 separate cards, only 2 dual-gpu cards can be SLI'd together for quad sli (like gtx 590), unless they added the feature on kepler
post #3 of 18
Quote:
Originally Posted by melterx12 View Post

you can't quad sli 4 separate cards, only 2 dual-gpu cards can be SLI'd together for quad sli (like gtx 590), unless they added the feature on kepler

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post #4 of 18
post #5 of 18
I would not get the 680 for that resolution. Performance difference between the 680 and 7970 is 15% at 1080p and 5% at 1600p. Logic would say that higher resolutions due to the increased memory bandwidth and VRAM on the 7970 that it is actually the faster card at surround resolutions.

My two cents.
    
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post #6 of 18
1) Yes, 4GB will be better. But 2GB is also fine, depending on games I think.
2) Should be okay for 3 cards, but not sure on 4. IDK if that PSU has the connectors available. I'm sure some1 else with more experience will know.
3) No idea, sorry! I have a Phantom, and the giant extraction fans at the top are very nice smile.gif

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post #7 of 18
If you are waiting for the 4GB versions, I think that will make a great match. The 2GB 680 is generally faster than the 7970 at ultra high resolutions anyway, so the 4GB should dominate. Also the 680s are at least rumored to come in at a lower price point too!
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post #8 of 18
Thread Starter 
Quote:
Originally Posted by melterx12 View Post

you can't quad sli 4 separate cards, only 2 dual-gpu cards can be SLI'd together for quad sli (like gtx 590), unless they added the feature on kepler

Umm, wut? tongue.gif
Quote:

Those are GTX 480s. Big difference man.
Quote:
Originally Posted by jtom320 View Post

I would not get the 680 for that resolution. Performance difference between the 680 and 7970 is 15% at 1080p and 5% at 1600p. Logic would say that higher resolutions due to the increased memory bandwidth and VRAM on the 7970 that it is actually the faster card at surround resolutions.
My two cents.

Well 7970s certainly aren't out of my head. Just depends on how far their price drops.
Quote:
Originally Posted by dannieftw View Post

1) Yes, 4GB will be better. But 2GB is also fine, depending on games I think.
2) Should be okay for 3 cards, but not sure on 4. IDK if that PSU has the connectors available. I'm sure some1 else with more experience will know.
3) No idea, sorry! I have a Phantom, and the giant extraction fans at the top are very nice smile.gif
You're a highschooler?
How do you afford these things!? tongue.gif

I think I'll wait for the 4 GB, price depending. I also have a Phantom! tongue.gif But if my PSU could do quad-SLI, I'd have get something like the HAF X or Switch 810. Well, I sold my childhood and asked for money for a few holidays from everyone. Easy as that.
Quote:
Originally Posted by XPC View Post

If you are waiting for the 4GB versions, I think that will make a great match. The 2GB 680 is generally faster than the 7970 at ultra high resolutions anyway, so the 4GB should dominate. Also the 680s are at least rumored to come in at a lower price point too!

Yeah, I think a 680 4 gb will be better for that res. But I'll also play at 1080p some.
     
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post #9 of 18
Well I've started thinking and I'm sure they will release the dual gk104 card before the 4gb version to try to curb the performance gap with the up and coming 7990. I could be wrong but it seems like that sort of thing would be on their back burner atm. rolleyessmileyanim.gif
post #10 of 18
Firstly, I really would just get two cards ... tri-SLI is pretty much a terrible bang-for buck proposition imho because the third card only gives you 30-45% scaling, yet costs as much as the 2nd card which gives you 75-95% scaling. Plus they'll run pretty hot as they'll all be sandwiched together, plus you want an upgraded board with an NF200 chip that costs a premium ...

Also, I've never seen any actual benchmarks that tangibly show there's additional value to having >2gb for 3x1080p setup. I might worry about it if I was running 3 x 30" monitors but for 3 x 1080p I'm sure that 2 x GTX680 2GB is going to be plenty of GPU grunt for now and for a ways into the future.

BTW guys AMD cards have been increasingly better (vs. nV) as resolution increases going back quite a long time ... even back when comparing the GTX285 to the 5850 ... both 1GB cards, and the 285 had just as much bandwidth ... the higher the res, the better the AMD card did relative to it. IOW, this tendency has to do with the chip architecture and drivers and things like that, NOT because AMD cards have more VRAM.

IOW, the notion that the 7970 'catches up' to the 680 at higher resolutions just because it has 3GB of vram and the 680 only 2GB is almost certainly incorrect.

Fact is, either you have ENOUGH vram for the situation at hand, in which case you get 'normal' performance, or you do NOT, in which case performance starts to massively tank. There is zero utility in having more vram than is actually needed for the situation at hand.

When you see a uber-high resolution benchmark where the 7970 suddenly crushes the 680 by 40% or more, then you can start talking about the amount of memory on the cards coming into play thumb.gif

Until then, and in all other cases, you should assume it's either the way the drivers are tweaked, or the overall architecture ... and it won't be 'solved' by getting a 4GB GTX680 (unless it's that aforementioned scenario where the 7970 is destroying the 2GB card at like 3 x 30" monitor size)
Edited by brettjv - 3/21/12 at 9:18am
    
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