iMac 5K lag issue

Discussion in 'iMac' started by Risck256, Aug 3, 2016.

  1. Risck256 macrumors newbie

    Risck256

    Joined:
    Aug 3, 2016
    Location:
    Italy
    #1
    Hi Everyone!
    I bought the new iMac 5K with the graphics card R9 M380.
    until the first power on, when I resize app to fullscreen or open the launchpad, I note some lags.
    I would like to know if this comportment is normal (with this video card...).

    sorry for my english
    thank you
    regards
     
  2. blufrog macrumors member

    Joined:
    Dec 19, 2014
    #2
    Hi,

    This was an issue with the M295X also, but a software update addressed the problem.

    I'm running 10.11.6 and no issues here. What are you trying to resize when it seems choppy?

    Switching between fullscreen applications isn't totally smooth - it looks like 20 FPS - but it is a smooth 20 FPS.

    You might want to try a software update, and see if that helps.
     
  3. Risck256 thread starter macrumors newbie

    Risck256

    Joined:
    Aug 3, 2016
    Location:
    Italy
    #3
    Hi!
    Thank you for the answer.
    I updated my mac one week yet.
    Any app that i resize to fullscreen cause a lag( animation when you clicking the green button), and yes.... the fps are about 20...
    Now with process monitor.... when I resize the windows the animation goes to 5 fps...
     
  4. blufrog macrumors member

    Joined:
    Dec 19, 2014
    #4
    I've found lists to be very slow (e.g. scrolling iTunes music list). This seems to be a "feature" of lists and not a problem with the application or the computer. Why lists are slow to update I don't know, but it has something to do with how they are updated as you either scroll them or resize them so you can see more or less information in them.
     
  5. Risck256 thread starter macrumors newbie

    Risck256

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    #5
    But the very problem is: when I try in the apple store this animation, like resize or scrolling. It was all fluid and no lags are presents.
     
  6. Samuelsan2001 macrumors 604

    Joined:
    Oct 24, 2013
    #6
    This seems to be some very poor coding on apples part and has been with us since retina screens appered on our macs, hardware wise there is no good reason for this behaviour.
     
  7. maflynn Moderator

    maflynn

    Staff Member

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    #7
    I've not noticed any lag, but I'm on the M395 dGPU, perhaps that has just enough horse power to over come that issue
     
  8. Risck256 thread starter macrumors newbie

    Risck256

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    #8
    If it were a bad code the problem has noticed also on the highest model, or not?
     
  9. maflynn Moderator

    maflynn

    Staff Member

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    #9
    No, because the performance of the GPU could mask the issue of poor coding.
     
  10. Risck256 thread starter macrumors newbie

    Risck256

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    #10
    I understand, thank you a lot.
    so, yosemite or the new beta sierra have the same issue? or with the latest beta version, something is change? if someone had tried it.
     
  11. maflynn Moderator

    maflynn

    Staff Member

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    #11
    I don't have the lag, so I can't say.
     
  12. Risck256 thread starter macrumors newbie

    Risck256

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    #12
    I think that this situation will not never improves :D
     
  13. iMcLovin macrumors 68000

    iMcLovin

    Joined:
    Feb 11, 2009
    #13
    THe lag in OS X on 5K iMacs was fixed in Yosemite because they started using Metal for all the animations in OS X. So if you update to Yosemite you shouldnt experience any of it.
     
  14. Risck256 thread starter macrumors newbie

    Risck256

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    #14
    I have 10.11.6 and lag still present.
    Mission control is ok but not the rest
    If I set a resolution lower then 5k, all the animations are smooth
     
  15. iMcLovin macrumors 68000

    iMcLovin

    Joined:
    Feb 11, 2009
    #15

    strange, not an issue on my machine with radieon R9 M295X
     
  16. Risck256 thread starter macrumors newbie

    Risck256

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    #16
    for this problem I think that the AMD R9 M380 is too lower for this mac... today I will try to change with the speedest model with M390 if it's possibile
    (in Italy you have only 8 days for change a product)
     
  17. Risck256 thread starter macrumors newbie

    Risck256

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    #17
    I tried other iMac, the resize of apps is the same of mine, the only one difference is the animation of fullscreen that goes about 20 FPS in my iMac, I guess that with the new OS this problems are solved.
    I only go on internet and I use the iMac for multimedia... but the animation in 2D mustn't laggy!!!!
    --- Post Merged, Aug 4, 2016 ---
    I thought... does it could the HDD? the performance of HDD are not sufficient for this resolution?
     
  18. Risck256, Aug 7, 2016
    Last edited: Aug 8, 2016

    Risck256 thread starter macrumors newbie

    Risck256

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    #18
    Hi at all!!!!!
    I'm happy because I tried to update my os to Sierra and lags are disappeared!!!!
    Thanks to all!! :D
     
  19. mabaker macrumors 65816

    mabaker

    Joined:
    Jan 19, 2008
    #19
    How is your screen, though?

    Is it yellow or does it look good and is uniform all the way? I'm interested to know.
     
  20. Risck256 thread starter macrumors newbie

    Risck256

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    Aug 3, 2016
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    #20
    The colors appears normally, if you mean this
     

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