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[TPU] ASUS unveil 39inch 4K VA monitor - Page 18

post #171 of 502
It's the fact the card can't do it such a high pixel clock through any individual port even though dp1.2 is CAPABLE.

No point going on about this till we can find some proof either way. I'm fairly certain what I'm saying is true but have to prove it.
post #172 of 502
Pixel clock can be upped as long as there is enough bandwidth AND the ports/board support the new settings.
A HDMI 1.4 interface can only push out 1 extra Hz @4K which is like nothing.
With a bit of luck mine does better than the Seiki even though I will be using a gtx570 to feed it for now.
post #173 of 502
Quote:
Originally Posted by hatlesschimp View Post

It's the fact the card can't do it such a high pixel clock through any individual port even though dp1.2 is CAPABLE.

No point going on about this till we can find some proof either way. I'm fairly certain what I'm saying is true but have to prove it.
The GTX Titan supports 4k resolution, and has a maximum single output of 4096x2160.

I don't know how to do the math myself, but if the card supports DP 1.2, then it must be capable of meeting the demands of the interface. Since the demands of DP1.2 specify a bandwidth of 17 and change Gb/s, and 4k resolutions falls below this, I think it is safe to assume it will work fine.

Not to mention, as far as I know, the Titan is the only card (possibly the 780 now as well) that has native support for 4k. Now, what I do not know is whether or not they can get away with putting a displayport on a card that is not capable of meeting the specifications of the interface. I would assume that since the card is capable of saturating a DVI connection, as well as HDMI, that it can also do so with displayport.

I do not however know enough details to make the calculation to find the required pixel clock for that resolution, but I believe 3840x2160 @ 60hz requires a bandwidth of just under 15 Gbps correct?

I could be wrong, I might be wrong on my maths.... But I don't know how that translates to the pixel clock.

Also somewhere else (another post) I think I may have used the wrong horizontal resolution, but I don't recall where it was, but I remember typing 3860 for some reason... ignore that.
Edited by Masta Squidge - 6/10/13 at 2:53pm
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post #174 of 502
Quote:
Originally Posted by Masta Squidge View Post

The GTX Titan supports 4k resolution, and has a maximum single output of 4096x2160.

I don't know how to do the math myself, but if the card supports DP 1.2, then it must be capable of meeting the demands of the interface. Since the demands of DP1.2 specify a bandwidth of 17 and change Gb/s, and 4k resolutions falls below this, I think it is safe to assume it will work fine.

Not to mention, as far as I know, the Titan is the only card (possibly the 780 now as well) that has native support for 4k. Now, what I do not know is whether or not they can get away with putting a displayport on a card that is not capable of meeting the specifications of the interface. I would assume that since the card is capable of saturating a DVI connection, as well as HDMI, that it can also do so with displayport.

I do not however know enough details to make the calculation to find the required pixel clock for that resolution, but I believe 3840x2160 @ 60hz requires a bandwidth of just under 15 Gbps correct?

I could be wrong, I might be wrong on my maths.... But I don't know how that translates to the pixel clock.

Also somewhere else (another post) I think I may have used the wrong horizontal resolution, but I don't recall where it was, but I remember typing 3860 for some reason... ignore that.

You've done well!

I've started a thread here about the Titan and dp1.2. I'm sure someone has come across this or is good at googling and wants some +REP.

http://www.overclock.net/t/1399477/what-is-the-gtx-titans-max-pixel-clock-for-dp1-2

I hope I'm proven wrong because it would suck to have titans and they can't run at 60hz for 4k. Nvidia have to play the game and support 2 monitor configs in surround.
post #175 of 502
You apparently posted the same thing 15 hours ago on nvidia's site as well.

I take that back, for some reason google said it was 15 hours ago, and it says 5 minutes ago on the actual page.
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post #176 of 502
Lol just posted it 2 minutes ago and copy and pasted it here to a new thread. smile.gif

Gtx titans max pixel clock for dp1.2
OCN forums
http://www.overclock.net/t/1399477/what-is-the-gtx-titans-max-pixel-clock-for-dp1-2

&

Nvidia GeForce forums
https://forums.geforce.com/default/board/34/geforce-600-series/
Edited by hatlesschimp - 6/10/13 at 3:09pm
post #177 of 502
I have yet to see any GPU be able to run the Sharp 4K screen at 60 Hz via a single cable and single display mode. NVIDIA cannot do it at all and AMD can only do it as 2-display Eyefinity. Some work needs to be done on this front. redface.gif
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post #178 of 502
Quote:
Originally Posted by CallsignVega View Post

I have yet to see any GPU be able to run the Sharp 4K screen at 60 Hz via a single cable and single display mode. NVIDIA cannot do it at all and AMD can only do it as 2-display Eyefinity. Some work needs to be done on this front. redface.gif
I can't find any information that it is incapable of doing so.

Wikipedia lists the titan as being 4k capable, but as this discussion indicates that doesn't mean 60hz.

If it cannot do 60hz, then I don't want anything to do with it. I will stick to my surround setup. You mention specifically the AND part, are you saying it can do so with one cable, but it treats it as two displays? I thought this was the point of running displayport, as it treats it like one connection.

DVI certainly cannot run it at all without two cables, so surely you can't be referring to running only one DVI cable.
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post #179 of 502
If you have AMD gpu's you can run it in MST mode. Which effectively is like running 2 screens at 30hz but joins them together for one image and interpolates to make 60hz. You probably already know this. Nvidia does not have any solution for this. Apparently they are working on this???

I've seen a few people buy the sharp 4k monitor and they have 2 and 3 titans. I really feel for them. 2 dvi-d cables and an AMD card required for 60hz. I think this is what Vega is referring too.

The ASUS monitors are attractive with the DP1.2 but we need someone to confirm that it will run at 60hz with a GTX Titan or any NVIDIA gpu (pixel clock wise).

I'm trawling through Evga's forum now. They seem to know a lot about pixel clocks.
Edited by hatlesschimp - 6/10/13 at 3:27pm
post #180 of 502
According to the link you yourself posted, it doesn't work that way.

It runs the left and right sides of the screen as different monitors, they mentioned having problems with it trying to run one side at 60hz and the other at 30hz. As for other nvidia cards, afaik the only one capable of supporting the 4k resolution is the Titan, and possibly the 780. That leaves literally everything else out.

MST mode is a networking thing man.
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