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EVGA GTX970 sc How many 4K monitors can I connect

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N1okh
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2016/04/09 15:48:02 (permalink)
Hi new here , I'm a stock day trader . I have at the moment 3 x 2k 27" monitors running off a EVGA GTX970 sc. Im looking for another screen or two .
I have a 40" 4K tv in one of my rooms that I plugged in to the GTX970sc and I love the display . Everything is the same size as the 2k tv but on the 4K at 40 " I have more room to work on for my charts .
So my question is how many 4K TVs can I connect on to my GTX970sc . I will Not be doing any gaming at all . It's Only a trading computer.
Ideally I would get 3x 4K TVs .
If the GTX970 isn't good enough what is ? GTX980?

Thanks for looking
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    the_Scarlet_one
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    Re: EVGA GTX970 sc How many 4K monitors can I connect 2016/04/09 16:12:12 (permalink)
    If you aren't gaming, and you already have 3 displays connected, I would guess you can do 3. The card should only experience hindrance while trying to render games or something of that sort. Displaying a desktop can be accomplished by a cpu with an iGPU, even though everything thinks a GPU is required.

    The size of the screen (40") will have no affect on the capability of the card. Only the fact it is 4k. The gpu can support up to 4 monitors according to the specs.

    The 980 will not do anything a 970 can do at the desktop. Any graphics card can actually, it's just the output port that is important to you.

      <- Clickable link to my Main PC Specs
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    z999z3mystorys
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    Re: EVGA GTX970 sc How many 4K monitors can I connect 2016/04/09 16:16:15 (permalink)
    I was able to run 2 3840x2160 monitors at 60hz from a gtx 980, plus a 1080p display, I haven't been able to test if 3 of them would work, or not, but my best guess is that it likely would, there is a chance however you'll have to drop the refresh rate down to 30hz however, but I'd be surprised if it couldn't run 3 at at least 30hz, however, if a 970 has a much lower pixel clock, it could be different.
     
    that said, the limiting factor and specification you'll want to know is "pixel clock" that's how many pixels it can push, you'll need at least a ~1500mhz pixel clock for 3 4k displays at 60 hz, or ~750mhz for 3 at 30hz
     
    unfortunately max pixel clock isn't a commonly listed spec, so that might be hard to find and nail that detail down.
     
    edit: did a little digging, and it seems the max pixel clock for any maxwell (gtx 970, 980, etc.) card is 1045mhz, not enough for 3 4k displays at 60hz but 30hz should work I think.
    If it doesn't you can also get a second card to run the third (or even 4th) monitor I think. provided there is a second PCIe slot that can take it.
    post edited by z999z3mystorys - 2016/04/09 16:22:52


     
     
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    N1okh
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    Re: EVGA GTX970 sc How many 4K monitors can I connect 2016/04/10 00:50:34 (permalink)
    Hi , thanks for both of your replys . I did I bit searching I might wrong here but I found it that it says
    GTX970 has base clock 1165. MHz And a Boost clock. 1317 MHz

    So looking at 4K TV to run at 60hz is 500mhz and a 2k tv at 60hz is around 230mhz
    Is this all I need to look at when working it out for monitors/TVs

    So on the GTX 970 at boost clock it could fit 2 x4k and 1x 2k monitors and run at 60hz ?

    I looked at the EVGA GTX980sc and the base clock is 1266mhz and the boost clock is 1367mhz so not much in them . Am I correct thinking this ?

    Thanks
    #4
    z999z3mystorys
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    Re: EVGA GTX970 sc How many 4K monitors can I connect 2016/04/10 00:57:26 (permalink)
    there's a difference between the core clock and pixel clock, they are two different things. Core clock(both base and boost) affect how fast the graphics card is when it come to rendering and other GPU related tasks, pixel clock is all about what it can push over the display connections, regardless of how complex the process is of creating that image.
    IE if you're running a high end game, it has to first create the image, then send it. the core/GPU clock affects how fast it can create an image, and the pixel clock is how fast it can send it. so if you're creating images that are fairly easy to make (like 2d graphs) it won't take a ton of work on the GPU's processor, but it'll still have to send that data to the monitor, and it can only do that so fast.
     
    edit: forgot to mention there is a lot more to how powerful a GPU is that core clock, that's just one of the factors in that type of speed, and shouldn't be too important for 2d images at this level of GPUs.
    post edited by z999z3mystorys - 2016/04/10 01:02:26


     
     
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    N1okh
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    Re: EVGA GTX970 sc How many 4K monitors can I connect 2016/04/10 02:40:57 (permalink)
    That's just blown my mind lol Is pixel pipeline the same a pixel clock ? As the gtx970 has 1664
    I'm just wondering is there a way to calculate if 2 x 4ks TVs will work on the gtx970
    And will 3 x4k TVs work on the gtx980 at 60hz , when i had one at 30hz the desktop was flickered when I opened start menu on Windows etc so needs to be at 60hz.
    And yea its only 2d I'm using
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    z999z3mystorys
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    Re: EVGA GTX970 sc How many 4K monitors can I connect 2016/04/10 22:56:59 (permalink)
    N1okh
    That's just blown my mind lol Is pixel pipeline the same a pixel clock ? As the gtx970 has 1664
    I'm just wondering is there a way to calculate if 2 x 4ks TVs will work on the gtx970
    And will 3 x4k TVs work on the gtx980 at 60hz , when i had one at 30hz the desktop was flickered when I opened start menu on Windows etc so needs to be at 60hz.
    And yea its only 2d I'm using



    Pixel pipelines is yet another stat, as confusing as that is.
     
    for number of pixels needed, you take the resolution (3840x2160 for 8,294,400 pixels total for your average 4k/UHD tv), then multiply by the refresh rate (60) and you get how many pixels are needed a second (497,664,000). do that for each monitor and add that up and you get how much you need total. Also make sure that the TV you are using supports HDMI 2.0, or displayport (though displayport for TVs is pretty rare) You can do it with older 1.4 HDMI, but it requires downgrading the color info to do it, which may or may not be a big deal depending on how critical it is to see differences in color. If you are looking at say a graph with dozens of lines, some close in color, it might make a difference in how easy it is to tell apart. that said I haven't tested it, so don't know for sure how significant the color differences is.
    post edited by z999z3mystorys - 2016/04/10 23:01:47


     
     
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    N1okh
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    Re: EVGA GTX970 sc How many 4K monitors can I connect 2016/04/11 13:21:29 (permalink)
    Thanks for the info. So today I went got n got matching tv . So now I have 2x 2k monitors @60hz plugged in and also 2x 4K monitors @ 60hz plugged in and all working fine off the EVGA Gtx970sc
    Works spot on . Connections I've used are

    2k monitor dvi-d in to dvi-d
    2k monitor dvi-d to dvi-I but I've used a Dvi-d cable
    4K TV hdmi to DP using club3d active adapter hdmi to dp
    4K TV hdmi to hdmi

    Thanks for your help on this appreciate it 👍
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