HT202856: Using 4K displays and Ultra HD TVs with your Mac

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digitalcoleman

Q: Mac Pro Late 2013 and Samsung 4k monitor problem

I have the new Samsung 28" 4k screen (U28D590D) and it has tearing along the right edge when used with displayport. Any way to fix that? I tried different cables (all DisplayPort 1.2 complient) to be sure and have narrowed the issue to the Mac Pro. The HDMI works fine tho only @30hz so is a bit laggy in normal interaction. There is no way to turn on Multi-stream as indicated and I hope it isnt that this screen will never work.

Mac Pro, OS X Mavericks (10.9.2), Dual Fire Pro D700

Posted on Apr 11, 2014 2:12 PM

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Q: Mac Pro Late 2013 and Samsung 4k monitor problem

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  • by seminolefans,

    seminolefans seminolefans Sep 19, 2014 11:04 AM in response to Gemylon
    Level 1 (4 points)
    Sep 19, 2014 11:04 AM in response to Gemylon

    So I would imagine that if Apple ever supports 60hz over HDMI 2, my guess is that'll require a new Thunderbolt to HDMI 2 converter cable.  But for apple to support HDMI 2 over thunderbolt (or via a future Mac with an HDMI 2 port), they'll need to have an HDMI 2 controller on the motherboard (which it's my understanding that no mac currently has anything better than HDMI 1.4 -- which gives 4k at 30hz max res).

  • by lllaass,

    lllaass lllaass Sep 19, 2014 11:04 AM in response to lllaass
    Level 10 (190,672 points)
    Apple Watch
    Sep 19, 2014 11:04 AM in response to lllaass

    Also, just what do the specs for your TV say? about 4K? Does it say at 60 Hz?

  • by seminolefans,

    seminolefans seminolefans Sep 19, 2014 11:08 AM in response to lllaass
    Level 1 (4 points)
    Sep 19, 2014 11:08 AM in response to lllaass

    Thunderbolt 1 does not support 4k at 60hz, only Thunderbolt 2 (bandwidth required for 4k at 60hz exceeds what TB1 can support).  Thunderbolt 2 can support it, but you must have minidisplayport (same fit as a Thunderbolt cable) to displayport 1.2 converter cable.  See previous post for Amazon example.

  • by seminolefans,

    seminolefans seminolefans Sep 19, 2014 11:11 AM in response to lllaass
    Level 1 (4 points)
    Sep 19, 2014 11:11 AM in response to lllaass

    Just because a 4k TV has a 60hz or better refresh rate doe not mean that it has a connector (i.e. displayport 1.2 only current way to connect a Mac)  to support a computer pushing a 40k at 60hz signal.

  • by seminolefans,

    seminolefans seminolefans Sep 19, 2014 11:23 AM in response to seminolefans
    Level 1 (4 points)
    Sep 19, 2014 11:23 AM in response to seminolefans

    Here are some good discussions.  According to some commentators, no upgrade in cables is required for HDMI 2.0 and it MAY be possible for Apple to upgrade latest gen Macs (with Thunderbolt 2 + HDMI ports) to HDMI 2.0 via a firmware upgrade.  But that is just speculation because Sony evidently upgraded their HDMI ports to ver 2.0 via firmware upgrade.  It probably has to do with what HDMI chipset apple includes on the motherboards -- and Apple's willingness not to intentionally withhold HDMI 2.0 for future Macs (not that they have a history of dribbling out such upgrades so their customers have to upgrade constantly)...

     

    http://apple.stackexchange.com/questions/140659/2560x1600-on-dell-u3011-with-new -macbook-pro

    https://www.ifixit.com/Answers/View/162369/Upgrading+1.4+HDMI+port+to+a+2.0+HDMI +port

    http://forums.macrumors.com/showthread.php?t=1695489

    http://forums.macrumors.com/showthread.php?t=1746437

    http://blog.alex4d.com/2013/09/04/hmdi-2-a-piece-of-the-2013-mac-pro-puzzle/

  • by Gemylon,

    Gemylon Gemylon Sep 19, 2014 11:25 AM in response to seminolefans
    Level 1 (0 points)
    Sep 19, 2014 11:25 AM in response to seminolefans

    Been trying to find info on the Hz for the TV ...

     

    What it says is that the fps is maxed at 30 for 3840 x 2160, so I guess that's it.

    At HD it runs at 50 fps.

  • by PB_NB,

    PB_NB PB_NB Sep 19, 2014 12:29 PM in response to seminolefans
    Level 1 (0 points)
    Sep 19, 2014 12:29 PM in response to seminolefans

    It seems that Apple has made some improvements concerning the use of 4k monitors. Apple has officially stated that they support a certain list of 4k monitors but these are typically MST (multi stream transport) technology. So the question is: Does the nMP support 4k monitors at 60hz? The answer would be "YES" providing the monitor is on the list of supported MST monitors. Refer to Apple support bulletin ht6008.

     

    As savvy users, we have decided to get much more affordable SST (single stream transport) monitors and then attempt to make them work. Joevt has graciously provided some file content to allow most of us to get close to 50hz @ 4k with our SST monitors. While this is a bit choppy, it is still far better than HDMI 4k @ 30hz. It's funny that when I bought my 4k monitor from Futureshop, the sales guy said that it wouldn't work with my nMP. I just looked at him sideways and thought that he was crazy.

     

    I was very disappointed that my nMP 6core with D500's struggled to drive my Samsung 28" 4k monitor. I was ready to return the nMP. But now, I am enjoying this setup. It took the Yosemite Beta to break the 50hz barrier. Now I am running 4k @ 60hz.

     

    It seems that Apple has decided to invest R&D in making OSX 10.10 work with SST technology while these fixes appear to be missing from OSX 10.9.

     

    Since SST is evolving rapidly, Apple and AMD need some time to catch up and I am happy with my personal results.

     

    Also, the retina scaling options work great and are super clear.

     

    I have attached a picture of my screen taken a few moments ago. It has been this way since I installed the 10.10 Beta.WP_20140919_11_23_49_Pro.jpg

  • by Nancy Villalta,

    Nancy Villalta Nancy Villalta Sep 25, 2014 3:06 PM in response to PB_NB
    Level 1 (5 points)
    Sep 25, 2014 3:06 PM in response to PB_NB

    I Have the Samsung 28" 4k monitor using display port 1.2 on my Mac pro 2013 D300 and am getting random flickering of the screen under osx Mavericks and Yosemite beta.

  • by PB_NB,

    PB_NB PB_NB Sep 27, 2014 1:40 PM in response to Nancy Villalta
    Level 1 (0 points)
    Sep 27, 2014 1:40 PM in response to Nancy Villalta

    Hi Nancy, I can't say that I have had the same flickering on my screen. It has been pretty stable.

     

    I just had a problem with waking it up once when I put the mac pro to sleep. Now I just use the energy settings and let it go to sleep that way. and it wakes up with a mouse click.

     

    Have you plugged another Thunderbolt device into the same bus? Have a look at the bus configuration for the mac pro. If you are hanging another device on the same bus, it could be interfering with the 4k SST output.

     

    If you haven't seen the TB bus layout, search the Apple support site for the tech bulletin.

     

    Hope that helps.

  • by FreeWheelMedia,

    FreeWheelMedia FreeWheelMedia Sep 28, 2014 2:37 AM in response to digitalcoleman
    Level 1 (0 points)
    Sep 28, 2014 2:37 AM in response to digitalcoleman

    Hi I'm curious I've tried the Samsung monitor with the mid 2012 macbook Pro and connected via the mini display to display cable the resolutions that are available are very low.

    Any tips as to how to set it up.

    Thanks for your help.

  • by lllaass,

    lllaass lllaass Sep 28, 2014 2:42 AM in response to FreeWheelMedia
    Level 10 (190,672 points)
    Apple Watch
    Sep 28, 2014 2:42 AM in response to FreeWheelMedia

    Just what resolutions are available?

  • by rpalacio,

    rpalacio rpalacio Oct 1, 2014 10:44 PM in response to digitalcoleman
    Level 1 (0 points)
    Oct 1, 2014 10:44 PM in response to digitalcoleman

    Good news! I have this same issue running 10.9.5.  But I installed the golden master (build 14A379b) of Yosemite tonight and my Samsung displays perfectly @60hz at all resolutions! FINALLY!  Yosemite should be out in just a few more days so rest easy Samsung U28D590D owners! Relief is on the way!

  • by lamaen,

    lamaen lamaen Oct 2, 2014 2:30 AM in response to dmolrub
    Level 1 (0 points)
    Oct 2, 2014 2:30 AM in response to dmolrub

    hi dmolrub

     

    I don't seem to be able to get it working. I'm on a new Mac pro D500, 10.9.5, and I followed your sep by step guide, but it only seems to create a text edit file in  System/Library/Displays/Overrides/DisplayVendorID-4c2d/ which is called the correct name, but with the extension ".saved" (DisplayProductID-b80.save) and no changes to my monitor (samsung). Any ideas?

     

    Rasmus

  • by deanpalmer,

    deanpalmer deanpalmer Oct 3, 2014 8:58 AM in response to PB_NB
    Level 1 (0 points)
    Oct 3, 2014 8:58 AM in response to PB_NB

    Does anyone know if it is possible to drive two of these displays at 60hz under any circumstance?

  • by seminolefans,

    seminolefans seminolefans Oct 3, 2014 9:05 AM in response to deanpalmer
    Level 1 (4 points)
    Oct 3, 2014 9:05 AM in response to deanpalmer

    Yes, as long as you have a 2013 Mac Pro with the lowest quality video cards (D300s) and a mini-diplayport to display port 1.2 adapter for each monitor, you can drive at least two (and if you believe Apple's claims 3).

     

    If you have either of the two better video cards (D500s or D700s), you can display at 60hz as well, but Apple has totally failed to produce a functional driver that won't produce the "tearing effect" on the right side of 4k monitors.

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