m7 1080p handbrake video conversion.

[Iniura]

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.

 

[Davidkoh]

Hmm, that's interesting. The m7 seems to throttle to a lower clock than the m5 when converting. At least according to this test: https://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).

 

[keviig]

Hmm, that's interesting. The m7 seems to throttle to a lower clock than the m5 when converting. At least according to this test: https://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).

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.

 

[TigerMSTR]

Hmm, that's interesting. The m7 seems to throttle to a lower clock than the m5 when converting. At least according to this test: https://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).

We don't know if the m5 would have throttled more.

 

[Davidkoh]

We don't know if the m5 would have throttled more.

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.

 

[mrex]

That 90C temp sounds bad... what if you disable the turbo boost?

http://www.rugarciap.com/turbo-boost-switcher-for-os-x/

It would be nice to be able to control the max speed of the cpu as it is possible in windows.