Late 2015 iMac 5k Temps

Discussion in 'iMac' started by LoftyHammond, Oct 18, 2015.

  1. LoftyHammond macrumors member

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    Dec 19, 2014
    #1
    Anybody know wether the new iMac 5k runs cooler than the last years model?
     
  2. cynics macrumors G3

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    Jan 8, 2012
    #2
    Well the Skylake CPU and the 300 series AMD GPU's should run cooler. But will it be cool enough is the question. We'll have to wait and see.

    Since we are seeing 100+ degrees currently I tend to think not, but that is based off the assumption that absolutely nothing else has been changed internally which might not be the case.
     
  3. Jason32 macrumors member

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    Oct 22, 2015
    #3
    I edited a 4k iphone file, 4 min video took 10 mins to export with full fan noise.
     
  4. sluggishadj macrumors newbie

    sluggishadj

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    Italy
  5. The Doctor11 macrumors 603

    The Doctor11

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    #5
    Just curious, what is the specs of your computer?
     
  6. billpendry.com macrumors newbie

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    Jul 16, 2008
    #6
    It would appear not:
    http://barefeats.com/imac5k13.html

    "The M395X runs just as hot as the M295X. Both quickly climb from 45C to over 100C when stressed. And at that temperature, the internal fan is running at the 2300RPM max (versus 1200RPM idle). Ambient room temperature was 21C."
     
  7. Jason32 macrumors member

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    Oct 22, 2015
    #7
    i7, m395x, 32gb, 256 ssd
     
  8. MandiMac macrumors 6502

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    Feb 25, 2012
    #8
  9. 2bcool2 macrumors regular

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    Jan 31, 2008
    #9
    i thought id buy the new 5k iMac (i7, 395x, SSD) as they must have sorted out the over heating problems and throttling .. now with these barefeats comments, i am worried that this computer won't last me 3 years and future proof me with 4k video editing using premiere cc and resolve 12 :-(

    if anyone has a i7 , 395x new iMac and uses it for 4k video editing and many layers using green screen and fx, please let me know if its loud and throttles ...

    why wouldn't apple fix the problems of the last 5k iMac ??????
    thanks for any comments, feel like i should cancel my order now
     
  10. akbıyık macrumors newbie

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    Sep 21, 2015
    #10
    This video should help;
    "Does the Late 2015 5K iMac Overheat? 2014 vs 2015 5K iMac Comparison"
     
  11. 2bcool2 macrumors regular

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    Jan 31, 2008
    #11
    Thanks, I've checked all the videos out about the new iMac on youtube, good to see this one appear today!.i like this guys videos, its very interesting that it doesn't now throttle, although i wonder if it sounds like a jet engine with the fan going so high ?

    i noticed max didn't give the details of the iMac spec that he tested.
    he states the cpu runs at 4.0ghz so i assume its an i7 chip he's testing.he doesn't
    state if its the top range 395x gnu on test either in the video or description.

    thanks for the link to this video, really interesting.

    I'm hoping to go 4k video next year, but my 2012 iMac when running premiere cc struggles with 1080p prores blackmagic footage when i have several layers of green screen and fx etc and adjustment layers and noise reduction .... i am really going this new iMac at top spec can handle lots of stuff i throw at it video editing

    it is confusing when bare feats comes out and says it still gets hot, i would tend to listen to people who have the new iMac that are using it with demanding tasks in video editing
    cheers
     
  12. joema2, Oct 25, 2015
    Last edited: Oct 25, 2015

    joema2 macrumors 65816

    joema2

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    Sep 3, 2013
    #12
    I'm a professional video editor and have both 2013 top-spec 3.5Ghz iMac 27 and 2015 top-spec 4Ghz retina iMac 27. I've run various FCP X tests and various CPU/GPU benchmarks on both machines. The 2015 iMac with M395X is no louder than the 2013 with GTX-780m, nor does the fan spin up any earlier (in my testing). If anything the 2015 iMac is quieter.

    On the "BruceX" FCP X benchmark the 2015 iMac with M395X is over twice as fast as the 2013 iMac with GTX-780m. This is only one benchmark, and across a range of other activities the difference isn't that great. In Lightroom import/export and preview generation, the 2015 iMac is about 15% faster, roughly the speed difference from 3.5 to 4Ghz.

    4k video editing is challenging on any computer, and you need the highest-end model you can possibly afford. This is especially so with multicam and compute-bound effects like stabilization, video noise reduction, etc. Premiere does not have an integrated proxy workflow like FCP X so if it's too slow on 4k and you've already set playback resolution to 1/4, your only real option is getting a faster machine.

    If you are using Premiere there are good arguments for using a Windows machine since you have more hardware configuration options, esp. for GPU. However it can work OK on a top-spec iMac.
     
  13. cynics macrumors G3

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    Jan 8, 2012
    #13
    We can assume which CPU that is based on the ghz. However there is no mention of GPU in the video or the description...
     
  14. alexxk macrumors 6502

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    Jul 29, 2010
    #14
    What software do you guy use to control the fan speed and check temperatures like that?
     
  15. mjohansen macrumors regular

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    Feb 19, 2010
    Location:
    Denmark
    #15
    Very good video. I think thats some good results no?
     
  16. 2bcool2 macrumors regular

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    Jan 31, 2008
    #16
    thanks for that insight, i used to use fxp then moved over to premiere cc, now resolve 12 looks great for green screen and editing, so hope to use that if it works out well.
    i use a bmpcc with prores, but next year i want to go 4k. who knows what cameras will be out next spring, hopefully something good.

    my iMac is on its way, just having second thoughts after reading bear feats etc, feeling a bit better now tho ha!
     
  17. 2bcool2 macrumors regular

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    Jan 31, 2008
    #17
    max video says TG PRO " Temperate Gauge Pro" great software
     
  18. 2bcool2 macrumors regular

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    Jan 31, 2008
    #18
    his iMac test from last year was 295x so makes sense that he would compare it with 395x
    i presume lol
     
  19. DaakuMaujii macrumors member

    DaakuMaujii

    Joined:
    Oct 25, 2015
    #19
    Correct, the iMac in the comparison video is the i7 4GHz with 395X. At the end of the video he provides a link to what he believes is the optimal value (with aftermarket memory upgrade) that links to the i7 4GHz, 8GB RAM, 256GB SSD, and 395X 4GB video. He mentions it is the same model he is testing in the video.
     
  20. DaakuMaujii macrumors member

    DaakuMaujii

    Joined:
    Oct 25, 2015
    #20
    Also, there is a mistake in the figures presented during the comparison where he manually adjusts the fan speed (around 2:40 till 3:25). The top figure reads "2015 - 5 RUNS" with 717 score, but the Fan RPM and CPU&GPU temps are for the 2014 model from the previous figures. They should read 1400 RPM, 61˚ CPU, and 96˚ GPU instead of 2000 RPM, 65˚ CPU, and 98˚ GPU.
     
  21. sluggishadj macrumors newbie

    sluggishadj

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    Oct 20, 2015
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    Italy
    #21
    He's suggesting to buy the i7 version with m395x so I presume he has that GPU.
     
  22. cynics macrumors G3

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    Jan 8, 2012
    #22
    Well I presume its a M390. See the problem?

    EDIT: I see if you follow some links to some random webpage you get what he says is the model he's testing....Blah meaningless, needs to capture to about this mac in the video.
     
  23. MaxYuryev macrumors newbie

    MaxYuryev

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    Oct 25, 2015
    #23
    Hey Guys, The Specs are:

    4ghz i7
    256GB SSD
    M395X 4GB
    24GB RAM (ups lost my second set of 16GB somehow, waiting for a replacement)

    The 2014 model I tested was similar 4GHZ i7 and M295X.

    I used both iStat menu and TG Pro check temps/speeds and TG Pro to do manual adjustments.

    Screen Shot 2015-10-25 at 9.17.58 AM.png
     
  24. 2bcool2 macrumors regular

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    Jan 31, 2008
    #24
    thanks for making the video. great information.
    appreciated :)
     
  25. jasonefmonk macrumors regular

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    May 5, 2011

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