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Old 06-01-10, 12:11 PM   #1
darkrider01
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Question Eyefinity - Why no equal from NVidia?

Since Windows Vista came out, span mode has been lost to multi-monitor NVidia users. The span modes were also lost to ATi users until the 5xxx series came around with Eyefinity.

Is Eyefinity a hardware assisted feature, or is it a driver feature? I can't understand why ATi has provided a solution for the "no span modes in Vista and Win7" issue, and NVidia doesn't seem to care.

One of the big selling points for me on the 5970 was Eyefinity. I don't care about doing 3 screens right now, but spanning across 2 monitors at 3840x1200 is sweet.

I really was hoping that the 256+ driver set for NVidia was going to include a feature set like that for their cards. Does anyone know if the 3dVision Surround will allow spanning without being in 3d?
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Old 06-01-10, 01:21 PM   #2
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Default Re: Eyefinity - Why no equal from NVidia?

I'm pretty sure that nvidia 3d surround will allow spanning without the use of 3D. for them to allow it for 3D but not without would be silly.

By the sound of it, ATI caught Nvidia with their pants down when they released Eyefinity. At that point, Nvidia thought that 3+ monitor setups were only meant for the professional market. ATI proved them wrong with eyefinity. When it was released and announced, Nvidia had already tapped out their first revision of the Fermi chip. At that point, there was no way for nvidia to add a feature for 3+ monitor support without drastically changing their chip. Thus, ATI has the ability to drive 3 or 6 monitors with one card, while nvidia does not.



Basically, ATI was sneaky this time, and it payed off.
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Old 06-01-10, 04:03 PM   #3
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Default Re: Eyefinity - Why no equal from NVidia?

Is this really a chip issue? I mean, what's stopping a single Fermi GPU from displaying to more than 2 monitors? I thought it was the other circuitry on the board that allowed for multiple monitors and not the GPU?

So it should be possible to build a Fermi-powered graphics card with more than 2 monitor outputs, but it would obviously not follow the reference design. The drivers would need to support it too.

I could be wrong though
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Old 06-02-10, 06:17 AM   #4
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Default Re: Eyefinity - Why no equal from NVidia?

In ATI's case, Eyefinity is a hardware feature. You can read about it in the Anandtech article. I think Nvidia has already said, that you need 2 GPU-s to run 3 monitors. Dont know about the 2 monitor span mode though.
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Old 06-02-10, 09:25 AM   #5
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Default Re: Eyefinity - Why no equal from NVidia?

That's the article I was looking for earlier. I knew I had read the story about RV870 before, but I couldn't find it again. It's a great read, btw.
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Old 06-02-10, 11:41 AM   #6
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Default Re: Eyefinity - Why no equal from NVidia?

It's a hardware and driver feature.

Eyefinity boards typically have 6 Mini-Displayport outputs. Drivers then decide which pixels to output to each port. The card needs to be able to support the number of pixels it puts out.

Nvidia cards typically only have 2 outputs.
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Old 06-02-10, 07:24 PM   #7
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Default Re: Eyefinity - Why no equal from NVidia?

and now the new ATI drivers support 3D. so ati is doing great with everything. i always had nvidia. first try with ati is the 5xxx
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Old 06-02-10, 10:40 PM   #8
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Default Re: Eyefinity - Why no equal from NVidia?

Quote:
Originally Posted by uibo View Post
In ATI's case, Eyefinity is a hardware feature. You can read about it in the Anandtech article. I think Nvidia has already said, that you need 2 GPU-s to run 3 monitors. Dont know about the 2 monitor span mode though.
But ATi is running Eyefinity on a single GPU 5870 - Eyefinity runs on all of the 5xxx series cards (at least the last time I checked).

Are you saying that NVidia would need 2 GPU's to accomplish an Eyefinity type display?
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Old 06-03-10, 03:08 AM   #9
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Default Re: Eyefinity - Why no equal from NVidia?

Quote:
Originally Posted by darkrider01 View Post
But ATi is running Eyefinity on a single GPU 5870 - Eyefinity runs on all of the 5xxx series cards (at least the last time I checked).

Are you saying that NVidia would need 2 GPU's to accomplish an Eyefinity type display?
Yes.

http://www.nvidia.com/object/3d-visi...echnology.html

Quote:
Minimum System Requirements

Note: NVIDIA Surround technology requires NVIDIA SLI Technology (two or more NVIDIA GeForce GPUs) to drive high definition gaming across three monitors.
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Old 06-03-10, 10:08 PM   #10
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Default Re: Eyefinity - Why no equal from NVidia?

The underlying problem for nvidia is that their current hardware only supports two monitors per gpu and would require a redesign of that part of the gpu to support more. ati was very sneaky with the 5xxx gpu and designed that part of the gpu to handle up to ?six? monitors per gpu. That being said, if nvidia did find a way to tweak their software to enable more monitors per gpu, their cards only ship with two outputs. I expect nvidia to catch up by the next generation.

I should note that gpu redesigns no matter how big or small require quite a lot of effort.
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Old 06-03-10, 10:16 PM   #11
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Default Re: Eyefinity - Why no equal from NVidia?

Quote:
Originally Posted by uibo View Post
That's actually kind of humorous since it was YEARS before you could even run dual monitors with SLI.

If you're planning on gaming over three monitors you're probably going to want SLI anyways.
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Old 06-06-10, 05:50 PM   #12
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Default Re: Eyefinity - Why no equal from NVidia?

nvidia say world’s first multi-display 3D gaming experience on your PC. lol is that true? because i know ati has 3d
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