HDMI output on 2014 Macbook Pro 13"

Discussion in 'MacBook Pro' started by estabya, Feb 19, 2016.

  1. estabya macrumors 6502

    estabya

    Joined:
    Jun 28, 2014
    #1
    I have spend the last 45 minutes trying to find a definitive answer to this question, but with no luck.

    I have the base model 13" 2014 Macbook Pro. I need to know if the HDMI supports supports 2560x1440 (WQHD) at 60Hz. I know I can use the Thunderbolt with a Mini-DP to DP cable, but I specifically want to know about the HDMI. From what I have found Apple indicates that the HDMI supports 1080p/60Hz, UHD/30Hz, and 4K/24Hz but there is no indicaiton of the refresh rate for WQHD.
     
  2. JTToft macrumors 68040

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    Location:
    Aarhus, Denmark
    #2
    Apple specifications list, as you say, 3840x2160 30 Hz. If you then cross reference that with the capabilities of each HDMI revision, you will see that the version that brought that capability was 1.4. Thus the machine has HDMI 1.4, and that will quite comfortably do 1440p 60Hz.

    Another method would be to calculate the bandwidth required for the two resolutions and refresh rates. You'd arrive at the conclusion that 1440p 60Hz requires less bandwidth than 2160p 30 Hz, and therefore that any standard which supports the latter also does the former.
     
  3. estabya thread starter macrumors 6502

    estabya

    Joined:
    Jun 28, 2014
    #3
    Thanks for the input.

    I know that it supports the desired resolution and refresh rate in theory, but I am also aware that in the past Apple has implemented software restrictions in OS X concerning video output. For example, I know that some older Macbook Pros could output 1440p under Windows, but not OS X. I was hoping to hear from someone who had actually tried it and knows whether or not it works.
     
  4. JTToft macrumors 68040

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    Aarhus, Denmark
    #4
    - I'm sure someone has tried it. But to be perfectly honest, 1440p at 60Hz is a pretty unexotic resolution. I'd be downright staggered if your machine couldn't do it on its HDMI port. Hell, even the rMB does it unproblematically via HDMI (converted through its DP in its USB-C port, it's true). And I'm pretty sure it's been officially supported since the very first MacBook Pro in 2006 with its ancient DVI port.

    Also, if they were to restrict it in software, it'd be pretty strange to allow 2160p but not 1440p.
     
  5. estabya thread starter macrumors 6502

    estabya

    Joined:
    Jun 28, 2014
    #5
    Prepare to be downright staggered. :p

    https://discussions.apple.com/thread/4021089?tstart=0

    Users in that discussion are not able to use 1440p at 60Hz over HDMI on a 2012 MBPr 15"... but only in OSX. It works fine in Windows. This was on Lion though, so I'm hoping this has been fixed since then.

    I guess I will just have to try it out if I don't hear from anyone. I'm going to get a screen with HDMI and DP, so worst case I can just use a TB port. I would just prefer to use HDMI so I can keep a second TB device connected. (Neither of my drives have dual TB ports.)
     
  6. JTToft macrumors 68040

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    Apr 27, 2010
    Location:
    Aarhus, Denmark
    #6
    - Thanks for that. Pretty outdated information, though, so I doubt it applies to your more recent machine and the latest OS X. Besides the support of the MBP and OS X, the monitor and the cable used also need to support it (and far from all 1440p monitors actually do), though it does seem some of those users weren't able to get the proper resolution despite having the correct equipment. But it also seems the consensus in the thread is that Mavericks fixed everything.

    I still think you're good.
     
  7. Samuelsan2001, Feb 20, 2016
    Last edited: Feb 20, 2016

    Samuelsan2001 macrumors 604

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    Oct 24, 2013
    #7
  8. JTToft macrumors 68040

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    Apr 27, 2010
    Location:
    Aarhus, Denmark
    #8
    - Based on what? We're speaking of simple 2560x1440 60Hz here, not any sort of 4K resolutions.
     
  9. Samuelsan2001 macrumors 604

    Joined:
    Oct 24, 2013
    #9
    Oops sorry thought we were talking 4K for a moment there. It should run that without breaking sweat from any port.
     

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