m7 1080p handbrake video conversion.

Discussion in 'MacBook' started by Iniura, Apr 27, 2016.

  1. Iniura macrumors newbie

    Joined:
    Aug 25, 2011
    #1
    Hey guys I ordered my m7/512 on the 20th and got it delivered on the 26th (netherlands)

    I know some people wanted to see this to compare it to the m5 so I thought why not do this test. Note that this is all new for me and I normally don't do these video conversions.
    I converted a 2min32sec video 1920x1080p file, I used the normal preset in handbrake H.264.

    It converted at an average of ~28fps.

    During the conversions I had only safari running with a couple of tabs open and was browsing.
     

    Attached Files:

  2. Davidkoh macrumors 65816

    Joined:
    Aug 2, 2008
    #2
    Hmm, that's interesting. The m7 seems to throttle to a lower clock than the m5 when converting. At least according to this test: http://forums.macrumors.com/threads/any-benchmarks-for-the-core-m7.1968663/page-4

    The power draw is a lot higher at the start for the m7 and it spikes way higher in temperature. The FPS seems to be about the same too (even though the conversion there was a bigger file and conversion lasted way longer).
     
  3. keviig macrumors 6502

    Joined:
    Jun 7, 2012
    #3
    First of all thanks for doing the test!

    It does seem to throttle to the same speed, which is what i was concerned about. At this point, the m3 (which has a max 2 core boost of 2 ghz) might actually be able to keep up with the m5/m7's in long throttled tasks. This is assuming the ambient temperature was the same in both tests.

    Whats weird is that i've done this exact same test on a UX305CA which has the m3 processor, and it only needed 4-5w to stay at 2 ghz, unlike the macbook which seems to use 8w. Strange that there is such a difference when they stay at the same speed. The UX305CA obviously was cooler too, at roughly 60-70c, due to only having to dissipate half the amount of heat. I doubt the Macbook has worse cooling, but for some reason it uses a lot more power.
     
  4. TigerMSTR macrumors regular

    Joined:
    Sep 30, 2014
    #4
    We don't know if the m5 would have throttled more.
     
  5. Davidkoh macrumors 65816

    Joined:
    Aug 2, 2008
    #5
    Judging from the linked test someone with a m5 did a 1080p handbrake conversion that took 18 minutes and only dropped under 2.0 Ghz occasionally. So I would say it is safe to assume that at least that m5 throttles about the same as this m7.
     
  6. mrex macrumors 68020

    mrex

    Joined:
    Jul 16, 2014
    Location:
    europe
    #6

Share This Page