macbook pro 2015 15 with no discreet graphic card 4k support

Discussion in 'MacBook Pro' started by jvmxtra, Sep 23, 2017.

  1. jvmxtra, Sep 23, 2017
    Last edited: Sep 23, 2017

    jvmxtra macrumors 65816

    jvmxtra

    Joined:
    Sep 21, 2010
    #1
    I am little frustrated by lack of post on this topic.

    Does or can this laptop do 4k monitor at 60hz? Based on my research, it can handle single 4k monitor. Is this true? Can it handle more than one? Is there any size limit? for an example, can it handle 4k 32 monitor at 60 hz?

    Do you have any experience? Have you ever really set this up? How is your experience? Which connection do you use?(DP I assume?)

    How would I know if below will work at 60 hz?

    http://www.lg.com/us/monitors/lg-32...LUcybE5PMkTTclIa0zwqohhfZ7jqkHchoC5pgQAvD_BwE

    Please let me know.

    thank you.
     
  2. Patcell macrumors 6502

    Joined:
    Aug 8, 2016
    Location:
    Bergen County, NJ
    #2
    Yes. The Intel Iris Pro integrated GPU in the base 2015 15” can handle one 4K display at 60Hz. No problem.

    Size of the monitor makes no difference at all. A 5.5 inch 4K smartphone display and a 65 inch 4K TV both have the same number of pixels... 3840x2160 pixels. Physical display size makes no difference to the GPU - only resolution.
     
  3. jvmxtra thread starter macrumors 65816

    jvmxtra

    Joined:
    Sep 21, 2010
    #3
    thank you for the reply. Just wanted to make sure monitor I was looking at would absoutely work w/ 60 hz
     
  4. djnigelchung macrumors member

    Joined:
    Jun 20, 2015
    Location:
    Silicon Valley
    #4
    I am having an issue with this laptop but with the m370x. I am having troubles getting 4k@60hz working. I got a displayport 1.2 adaptor and hdmi 2.0, yet under display settings it's only allowing me to output at 30hz. Is this something that should be automatically detected?

    With all my searching, I actually haven't been able to find anyone that has had this issue?
     
  5. jvmxtra thread starter macrumors 65816

    jvmxtra

    Joined:
    Sep 21, 2010
    #5
    This is the part of a problem. I wish there was a store I can walk in to try these things.
     
  6. jetOne macrumors newbie

    Joined:
    Sep 19, 2017
    Location:
    Toronto, Canada
    #6
    30Hz only on the 2015.

    2016 and up are the only ones that support 60Hz 4K
     
  7. Patcell macrumors 6502

    Joined:
    Aug 8, 2016
    Location:
    Bergen County, NJ
    #7
    I ran 4K 60 all day with my mid-2014 15” with 750M. The 2014 and 2015 15” models support 4K 60 regardless of graphics option according to Apple.
     
  8. djnigelchung macrumors member

    Joined:
    Jun 20, 2015
    Location:
    Silicon Valley
    #8
    Did you have to use displayport to hdmi?
    Did it automatically allow 4K at 60hz? When I display 4K it only gives me the option of 24, 25, or 30hz. I can confirm the TV I am using can support 4K @ 60hz (xbox one s runs perfect), and I'm using a displayport 1.2 and hdmi 2.0 cables. What am I missing?
    (Thanks for any help you provide)
     
  9. William Payne macrumors 6502a

    Joined:
    Jan 10, 2017
    Location:
    Wanganui, New Zealand.
    #9
    What if you plugged a mini DisplayPort cable right into one of the thunderbolt 2 ports? Would that work better. I know there are limitations with HDMI but not sure the details exactly.
     
  10. ZapNZs macrumors 68020

    ZapNZs

    Joined:
    Jan 23, 2017
    #11
    IIRC, you need to use miniDisplayPort on the computer-side connector for both displays to do 4k @60 x 2. The HDMI port only supports up to 30 (even with a 2.0 cable and 2.0-capable display - although a mDP-->HDMI 2.0 cable would presumably work if your monitor is HDMI 2.0 and does not have a DP input.)
     

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10 September 23, 2017