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Hot!Not getting full 3x 4k resolution with 2 way 970 ftw

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sktrgk
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2018/01/11 12:05:01 (permalink)
System:
Core i7 6800k
Asus X99-A II
32 GB RAM (2x16)
2x GTX 970 FTW in SLI
3x Dell P2715Q 4k @ 60Hz
 
Connections for the Monitors are 2x DP 1.2, and 1x HDMI 2.0.
 
I am trying to run these monitors in 2D Surround for a final resolution of 11520x2160, but the only option I have is 5760x1200. I have tried all sorts of connection combinations, but nothing is changing. I am running the latest Geforce drivers 390.65. 
 
These cards only have these connections:
1x HDMI
1x DP
1x DVI-I
1x DVI-D
 
And the monitors have these input connections:
1 x DisplayPort
1 x Mini DisplayPort
1 x HDMI (MHL)


Any ideas on why I can't get the full surround resolution and why I am stuck on 5760x1200?
 
Thanks in advance.
post edited by sktrgk - 2018/01/11 12:10:43
#1

23 Replies Related Threads

    Cool GTX
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 12:31:54 (permalink)
    Welcome to the Forums
     
    Nvidia Surround Tool
     

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    Nibbler - EVGA X99 Classified, 5960X, 2-TitanX P & EVGA 1080FE, Custom loop, modded Phanteks Enthoo Primo, 32GB GSkill DR4, Intel NVMe PCIe 750 SSD, Win10 Pro, EVGA 1600 P2, Folding 3.5M PPD, 4K Acer XB280HK monitor
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    #2
    sktrgk
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 12:36:03 (permalink)
    Thanks Cool GTX! I've tried that tool, but that has the connections for the reference GTX 970s from Nvidia, which has 3x DP and 1x HDMI and 1x DVI-D, which doesn't match what the EVGA GTX 970 FTW cards have as noted in my first post. So I'm not sure how much it helps or applies to my setup. 
    #3
    Cool GTX
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 12:39:14 (permalink)
    OK but what about the directions about the center monitor - on that page ?
     

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    #4
    sktrgk
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 12:44:12 (permalink)
    Yup, tried that combination, and it didn't change anything. The only option for resolution stayed at 5760x1200.
    #5
    Sajin
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 12:46:31 (permalink)
    Maybe a driver issue? Try doing #2 listed here to correct any driver issues.


    #6
    Cool GTX
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 12:47:19 (permalink)
    What resolution are the 4K monitors set at ?
     
    3 monitors at 4K is asking a lot from a pair of 970s
     
    What happens with only 2 Monitors ?
     
    Wish I had more to offer

    Nibbler - EVGA X99 Classified, 5960X, 2-TitanX P & EVGA 1080FE, Custom loop, modded Phanteks Enthoo Primo, 32GB GSkill DR4, Intel NVMe PCIe 750 SSD, Win10 Pro, EVGA 1600 P2, Folding 3.5M PPD, 4K Acer XB280HK monitor
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    CraptacularOne
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 12:58:31 (permalink)
    Are you planing to try and game at 11,520x2160 resolution? If so I'm afraid you're in for some disappointment as 2 GTX 970's are not going to be enough to drive such a massive resolution in really any of today's games with reasonable frame rates. Maybe some older eSports games like CS:GO or DoTA2 will run at medium/high settings with playable frame rates but that's about it. You would really need GTX 1080Ti's in SLI to attempt that resolution in modern games.
     
    Having said that, have you tried creating as custom resolution for your Surround grouping in Nvidia control panel? Have you verified all monitors are running at 4k resolution when not in a Surround grouping? Also for multimonitor you have to connect at least one of the displays to the lower card in a SLI setup.
     
     
    EDIT: Take a peek at this video. This is a video running 2 Titan Xp's in SLI with 4 4K monitor setup. He only manages 24fps in Crysis 3 at high settings and only 50fps with medium settings. Take into consideration that 1 Titan Xp is faster than 2 GTX970s in SLI and you can begin to see the magnitude of horsepower you need to drive such ridiculous resolutions. 
    https://www.youtube.com/watch?v=211Vdi4oC9o
     
     
    post edited by CraptacularOne - 2018/01/11 13:16:37

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    #8
    sktrgk
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 13:27:33 (permalink)
    Cool GTX: All 3 are currently set to 4k @ 60Hz (3840x2160). Haven't tried only 2 monitors. Will try that next.
     
    CraptacularOne: Nice name BTW. Yeah, I figured that is the case, but still wanted to try just as a fun exercise, and to see what it can do. Wish I had the money for 2x 1080 Ti's! I haven't tried making a custom resolution, do you have a link to instructions for that? Thanks.
    post edited by sktrgk - 2018/01/11 13:42:44
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    sktrgk
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 13:30:03 (permalink)
    Even with two displays, both plugged into one card, I am only getting a single option for a surround resolution of 3840x1200. I guess I'll look at drivers next. 
    #10
    sktrgk
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 14:07:25 (permalink)
    Sajin: I followed the instructions you suggest to clean and reinstall the drivers with no change :(
    #11
    Sajin
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 14:16:56 (permalink)
    Same issue with older drivers?


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    sktrgk
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 15:03:11 (permalink)
    Just got off the phone with Nvidia support and after some more cable swapping, it looks like the HDMI connection is what is causing headaches. When only two DP cables are plugged in (one per 970), I get the correct option for surround resolution 7680x2160. When it is one HDMI connection and one DP connection, I get the wrong resolution. Next step is to try a DP to HDMI cable to see if that will make it work. 
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    sktrgk
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 15:17:46 (permalink)
    Just did 2 monitors both connected using HDMI, and got the correct surround resolution. Once I find a HDMI to DVI-D connector, we'll see if I can get the correct 3x surround resolution. Since HDMI and DVI are most similar. 
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    Dr.Death
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 15:27:21 (permalink)
    A single dual-link DVI connection can deliver up to 2560 × 1600 at 60 Hz. Achieving 4K at 60Hz requires two dual-link DVI cables, or DisplayPort 1.2 or HDMI 2.0
     
    https://www.avadirect.com/blog/displayport-vs-hdmi-vs-dvi-vs-vga/
     
    make sure your cables will support true 4k 
    #15
    Sajin
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 15:34:33 (permalink)
    sktrgk
    Just got off the phone with Nvidia support and after some more cable swapping, it looks like the HDMI connection is what is causing headaches. When only two DP cables are plugged in (one per 970), I get the correct option for surround resolution 7680x2160. When it is one HDMI connection and one DP connection, I get the wrong resolution. Next step is to try a DP to HDMI cable to see if that will make it work. 

    👍


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    sktrgk
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 17:06:04 (permalink)
    Dr.Death
    A single dual-link DVI connection can deliver up to 2560 × 1600 at 60 Hz. Achieving 4K at 60Hz requires two dual-link DVI cables, or DisplayPort 1.2 or HDMI 2.0
     

     
    make sure your cables will support true 4k 


    Yeah, it looks like I'm limited to DP -> HDMI and hope it all works. If it doesn't then I'm looking at new GPUs to get 3x4k in Surround. 
    #17
    MhzManiac
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/11 23:16:48 (permalink)
    If those were my monitors I would set them up for 2K with the highest refresh rate possible and enjoy the gaming.

     
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    #18
    sktrgk
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/12 08:58:12 (permalink)
    Got it to work! The fix was to get an active DP -> HDMI adapter. After I installed and rebooted my system I had the option to do the max resolution expected. So now all three monitors are powered by the same connection type. I suspect a HDMI -> DP adapter, with the other two screens hooked up to DP directly would also work, but didn't test it out. 
     
    Thank you to all who gave ideas and suggestions!!
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    Sajin
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/12 09:06:14 (permalink)



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    Cool GTX
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/12 09:10:08 (permalink)
    enjoy your 3 display
     

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    Dr.Death
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/12 14:56:04 (permalink)
    good deal  / enjoy 
    #22
    highseas
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/01/31 10:21:56 (permalink)
    noice  I would still consider just a 1080ti before putting two 970s in sli... but for right now, that'll do. 
    post edited by highseas - 2018/01/31 10:45:00
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    ObiWonSuperman
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    Re: Not getting full 3x 4k resolution with 2 way 970 ftw 2018/02/18 23:25:45 (permalink)
    only if you can get your hands on one without having to sell your other arm... 
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