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Do You Use a Dell U2913WM Monitor?

9311 Views 13 Replies Latest reply: Feb 5, 2014 5:01 PM by vinicn RSS
Dr. Z. Level 2 Level 2 (235 points)
Currently Being Moderated
Jan 14, 2013 1:07 PM


Is anyone using a Dell U2913WM Monitor with a Mac Pro? Are you having any difficulties with the highest resolution of 2560x1080?


I bought this model monitor for it's unique panoramic design and 21:9 viewing. It worked fine at the highest resolution with my Mac Pro 3.06 GHz Intel Xeon 12-core computer, but then developed inconsistent blurriness in the image detail. The problem goes away with any resolution below 1920x1080, but this stretches the screen image and makes it unusable for my needs. In my troubleshooting I have done all the basics, as well as tested with another Mac Pro and three different DVI cables. My conclusion is that the issue is with the monitor. An AppleCare representative also agrees.


So, why am I posting this question? Well, I spent an hour on the phone with Dell and they state that the issue is with my Mac. It doesn't matter that I have seven Dell monitors in my office run by three different Macs without a problem or that the issue developed within the first week of use, I was still told that I needed to access a Windows machine for troubleshooting before a warranty replacement could be arranged. I would rather pound a nail into my head than deal with another Dell employee on troubleshooting. I plan to purchase another same model unit and return the one that I have under what Dell calls their "easy return" process. In the meantime, I had to at least ask what other Mac users have been experiencing with this model of monitor, mostly out of curiosity.


“Technological change is like an axe in the hands of a pathological criminal.” (Albert Einstein, 1941),
Dr. Z.

Mac Pro, OS X Mountain Lion (10.8.2), 3.06 GHz 12-Core Intel Xeon
  • Grant Bennet-Alder Level 8 Level 8 (48,180 points)
    Currently Being Moderated
    Jan 14, 2013 1:11 PM (in response to Dr. Z.)

    Specs indicate this display can be connected with:



    DisplayPort 1.2, USB 3.01, Mini DisplayPort, DVI and HDMI



    Which are you using?

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
  • Mitch Strickland Calculating status...
    Currently Being Moderated
    Jan 26, 2013 7:37 AM (in response to Dr. Z.)

    I am curious to know if you have received another Dell U2913WM yet and, if so, did the new monitor fix the issue? I was also wondering how you were able to select the maximum resolution (2560 x 1080) to be displayed from your Mac Pro? Did you have to use SwitchResX?


    I am considering recommending one of these monitors to a film student to use with a MacBook Pro (GT330M w/ 512MB video memory) using a Mini DisplayPort to Mini DisplayPort cable.



  • Grant Bennet-Alder Level 8 Level 8 (48,180 points)
    Currently Being Moderated
    Jan 27, 2013 8:03 PM (in response to Dr. Z.)

    Displays wider than 1920 wide require a Dual-Link DVI cable. Such cables have the data lines doubled, and MUST have all the pins in the grid present, as that is where the second set of data lines are.


    Most Mac Display cards have a Dual-Link DVI-I that you could connect to directly with that cable (no adapter).


    The issue with the Mini DisplayPorts is that their native signal LEVEL is too low to be reliably adapted to DVI. When you add the third display, there is not enough power to drive everything. You need to have Re-Driver circuits in the adapters ( sold as ACTIVE adapters).


    For Single-Link DVI adapters, you can get Accell for about US$35. Their dual Link is a little cheaper than Apple's but not a lot.

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
  • Bruno Fracassa Calculating status...
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    Feb 19, 2013 1:53 PM (in response to Dr. Z.)

    Dr. Z, Do you have any screenshots of your monitor you'ld be willing to share?

  • Bruno Fracassa Level 1 Level 1 (5 points)
    Currently Being Moderated
    Feb 19, 2013 3:59 PM (in response to Dr. Z.)

    Hey Dr.Z, I was actually interested in seeing the corrected display. No worries. Are you satisfied with the purchase / existing setup. I just came across these monitors today and think it would pair great with a Mac Mini. Furthermore, if the format catches on, I could see this aspect ratio doing quite well in a future iMac update.

  • tom_berlin Calculating status...
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    Mar 15, 2013 5:40 AM (in response to Dr. Z.)

    Hi all,


    I had the same issue (blurred vision when on full resolution) and thought something was wrong

    with the graphics card. (Nvidia Quadro 4000 & ATI Radeon HD 5770).

    Thanks to the discussion I could fix it by using the DVI-cable that came w/ the

    monitor. I had used an "old" DVI cable before.

    So - THANKS GUYS, you been a great help here! Now I am running three monitors at a time,

    perfect environment for After Effects or FCP!


    Have a great day!



  • renewabubble Calculating status...
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    Jun 30, 2013 9:34 AM (in response to Dr. Z.)

    I just got a U2913WM - worked fine at a resolution of 2560 x 1080 straight out of the box, using the mini display port > display port lead that came in the box with the monitor. Haven't used the dual link DVI cable at all, luckily didn't have to buy an expensive Apple adaptor.


    This is with a pretty old macbook (13 inch late 2008, 2.4 GHz Intel Core 2 Duo, NVIDIA GeForce 9400M 256 MB)

  • FreddyWhi Calculating status...
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    Aug 30, 2013 1:41 PM (in response to Dr. Z.)

    The reason there was no 2560x1080 resolution option is becuase DVI only supports resolutions of up to 1920x1200. You need dual-link DVI to supports resolutions higher. You can get these adapters but even third party ones are over £50, they also need to take one of your USB ports in order to get enough power. That's why the mini idplay port to display port cables are the best option, small and cheaper. SwitchResX can't help get higher resolutions than possible, just lower ones.

  • Artaraxl Calculating status...
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    Sep 25, 2013 1:54 PM (in response to Dr. Z.)

    Anyone having this problem -- you'll want to see these two posts:


    Force RGB mode in Mac OS X to fix the picture quality of an external monitor




    Two options:


    1) Use the script in the latter post to force the Macbook to output RGB. That also worked for me on a 2011 MBP with OS 10.7.5 and Dell U2913WM, using the included miniDP to DP cable.


    2) In my experience, even without using the script / terminal, you can get pretty close, even in the native YPbPr mode, by tweaking the settings only, as follows:


    Dispay Settings

    --> Sharpnes to 0

    -->Uniformity Compenensation: Off

    -->Smart Video Enhance: Off


    IMO, the picture quality is, however, marginally better when using the script to force RGB. In my case I set sharpness back to 40, and am now happy with this monitor.


    Good luck!

  • vinicn Calculating status...
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    Feb 5, 2014 5:01 PM (in response to Dr. Z.)



    1) Download this file:




    3) Drag the file you unzipped to the file OVERRIDES (will ask authentication with your user and pass)


    4) Restart your Mac!


    5) Let me know if worked!


    The reason is quite simple: the Imput Color Format should be RGB (red green blue). If you look at it in your monitor, you will see that will be YPbPr; this file will only change some numbers into your mac and will "force the mac" to send the signal as RGB to your monitor.


    Be aware that every monitor has its own numbers... so, try only with your.


    There is a script that can do for any othe monitor and you find here: (this is actually the guy who found that out!)... thanks to him!




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