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post #11 of 22
Quote:
Originally Posted by Tázï View Post
With 1 580 you have almost 1.6 vram,so with 2 cards you will have almost 3.2 vram...1 570 has almost 1.3 vram so 3 cards will have almost 3.9 vram...so why are you saying the 580's will have more vram.
Really, Tazi? Tri-SLI with all those cards and you don't understand how the memory capacity works in SLI

Just so you know moving forward, memory doesn't add in SLI like that. Your effective memory capacity is that of whichever card in the SLI set has the least vram. Any number of 580's has more effective vram than any number of 570's.

Something mentioned on this thread I've been wondering about though ... does running 3d make an additional vram demand vs. regular 2d? How much difference does it make ... any benches out their that illustrate the difference in usage?

Seems to me that if one were just going to run a single 720p monitor in 3d, unless the vram requirements go up significantly with 3d, a couple of 560's in SLI would be more than adequate in every regard.
    
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post #12 of 22
3D doesn't demand more vram.
It requires that you pretty much do 120 fps with what every settings you can.
In itself, it doesn't require more vram.

We have tested it before (I have the results at home somewhere in my pictures folder somewhere).
If you get 120fps at 60hz monitor in a 3D supporting game, switch to a 3D monitor and run the game in 3D, the vram usage stays pretty much the same.

There is a bit extra CPU usage and a bit more GPU usage as there is the need for drivers and flip frame display, but its not vram hungry in any way.


Also I will repeat what I said before:
The sony TV the OP wants to buy, does not support nvidia 3D.
So it will not many any difference than a normal monitor.
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post #13 of 22
Quote:
Originally Posted by Tázï View Post
With 1 580 you have almost 1.6 vram,so with 2 cards you will have almost 3.2 vram...1 570 has almost 1.3 vram so 3 cards will have almost 3.9 vram...so why are you saying the 580's will have more vram.
Seeing as how you have such extensive knowledge on tri-SLI setups, why don't you even understand how the memory scaling works? Not trying to bash, just curious is all.

SLI, Tri SLI, and Quad SLI are all going to have the amount of VRAM of the smallest card in the setup (since some cards have different RAM options). So 3x 570's, that's still only 1.25GB of VRAM. 4x 570's, that's still only 1.25GB of VRAM.

Thus, having just ONE GTX 580, you still have more VRAM than a quad SLI 570 setup.

The problem comes in with scaling and games that support it. It's hard enough getting games to use two GPU's properly. Putting 3 or 4 GPU's into a system makes it that much harder to get proper support for your games. If you're getting a 720p TV to use (I didn't see that part initially), then a 560 SLI setup would be just fine then. A single 560 would probably be enough. 720p takes almost no real GPU power to max out most games.

And seeing the below quote....

Quote:
Originally Posted by Defoler View Post
If you are getting rid of your surround and go back to single monitor (or tv), 2-way sli 580s is more than enough, even for 3D.

No reason to go to tri-570s.

Also, that sony tv, isn't going to work in nvidia 3D. Its a blue-ray and PS3 3D by sony specs, not nvidia compatible.
Just so you know before you spend your money.
Since the TV in question won't support Nvidia 3D, then you might be limited to 60Hz anyway still. So 3D gaming really won't help out much on your PC.
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post #14 of 22
Quote:
Originally Posted by Tázï View Post
With 1 580 you have almost 1.6 vram,so with 2 cards you will have almost 3.2 vram...1 570 has almost 1.3 vram so 3 cards will have almost 3.9 vram...so why are you saying the 580's will have more vram.
The frame buffer is duplicated onto each GPU's ram.

You'd still have 1.6gb of vram. It doesn't multiply.
post #15 of 22
Thread Starter 
Ok i did not know that about the vram,is there any cards that do work with this tv...maybe radeon cards...
Wait a sec a month ago i went to a sony conference and there new laptop that has 3d built in on a sony vaio with nvidia cards...wouldnt you think the screens on a laptop would be the same as there tv's
    
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post #16 of 22
Thread Starter 
Ok looks like i have to go with samsung,in nvidia forums theres a guy with the same tv and its not working,thanks for the save
    
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post #17 of 22
Quote:
Originally Posted by Tázï View Post
Ok looks like i have to go with samsung,in nvidia forums theres a guy with the same tv and its not working,thanks for the save
A lot of people make those mistakes because of false information and advertising

Best just go over the nvidia site on the supported TVs, or make sure the monitor or TV has nvidia written all over it.
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post #18 of 22
Quote:
Originally Posted by pioneerisloud View Post
Seeing as how you have such extensive knowledge on tri-SLI setups, why don't you even understand how the memory scaling works? Not trying to bash, just curious is all.

SLI, Tri SLI, and Quad SLI are all going to have the amount of VRAM of the smallest card in the setup (since some cards have different RAM options). So 3x 570's, that's still only 1.25GB of VRAM. 4x 570's, that's still only 1.25GB of VRAM.

Thus, having just ONE GTX 580, you still have more VRAM than a quad SLI 570 setup.

The problem comes in with scaling and games that support it. It's hard enough getting games to use two GPU's properly. Putting 3 or 4 GPU's into a system makes it that much harder to get proper support for your games. If you're getting a 720p TV to use (I didn't see that part initially), then a 560 SLI setup would be just fine then. A single 560 would probably be enough. 720p takes almost no real GPU power to max out most games.
Great minds think alike

So ... I dunno that much about 3d in general ... I'm guessing the diff between a nVidia-compatible 3d Gaming monitor is that it takes (up to) a 120Hz signal as an input, whereas the 'regular' blu-ray 3d types of monitors take (up to) a 60Hz signal as input?
Edited by brettjv - 4/26/11 at 10:02am
    
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post #19 of 22
Quote:
Originally Posted by brettjv View Post
So ... I dunno that much about 3d in general ... I'm guessing the diff between a nVidia-compatible 3d Gaming monitor is that it takes (up to) a 120Hz signal as an input, whereas the 'regular' blu-ray 3d types of monitors take (up to) a 60Hz signal as input?
Well its a simple way to say it

Nvidia 3D works by sending 120 frames to the monitor, where the first to the first shutter, and the second well, to the second shutter.

Sony 3D works by sending double size picture, 1920x2160 at 24hz (or 48 from the PS3), and the TV is slicing the picture and puts each image on its own shutter polarization.

The sony way, shows two pictures at the same time, while nvidia way shows a picture each time, but fast enough to feel as it we see the pictures together.
Nvidia's 3D is cheaper to make, while sony's means the TVs need to have some of the brain. But as they also build TVs, its what works better for them.

AMD 3D is different.
Its similar to nvidia, 120hz refresh rate monitors, but they work differently, and there are no shutter glasses.
Also AMD does not really "support" 3D. I mean, the drivers allow it, and they work with some companies, but there is no official AMD 3D, and its up to 3rd party software to make it work.
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post #20 of 22
I love my Tri SLI. Sometimes I do wish I would have bought 2 580's though. What's done is done though and no one wants to trade now though.
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