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MacBook Pro with i9 chip is throttled due to thermal issues, claims YouTuber

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191–200 of 413 posts

Re: MacBook Pro with i9 chip is throttled due to thermal issues, claims YouTuber

#191

It's probably because Toronto, where he lives, has been around 27 degrees and 70% humidity the last few days. That's around 7 degrees and 20% humidity above the typical office climate of around 20 degrees and 50% humidity. That difference can result in roughly 20% lower dissipation power if the temperature at the heatsink is around 50-60 degrees which it appears to have been historically. That 20% extra dissipation p…

He wasn’t testing it outside in the sun, though …

Re: MacBook Pro with i9 chip is throttled due to thermal issues, claims YouTuber

#192

It's probably because Toronto, where he lives, has been around 27 degrees and 70% humidity the last few days. That's around 7 degrees and 20% humidity above the typical office climate of around 20 degrees and 50% humidity. That difference can result in roughly 20% lower dissipation power if the temperature at the heatsink is around 50-60 degrees which it appears to have been historically. That 20% extra dissipation p…

He wasn’t testing it outside in the sun, though …

But if his place has no AC, it's even worse than outside (in the shadow)

Re: MacBook Pro with i9 chip is throttled due to thermal issues, claims YouTuber

#193
post #60

Earlier quoted context omitted.

Is the Intel upgrade treadmill is starting to show its age? How much longer can we keep making the chips "faster" when the tradeoff is increasingly just more thermal issues? Can't wait for a decent A-series chip MacBook.

The 'intel upgrade treadmill' consists of reducing transistor size and upping clock; the former of which reduces thermal issues, and the latter of which increases them.

> consists of reducing transistor size

It used to. The problem here is that they have not been able to ship next gen chips and so they started shipping a 6-core chip on the same process as the old 4-core, and that doesn't work so well.

Re: MacBook Pro with i9 chip is throttled due to thermal issues, claims YouTuber

#194

It's probably because Toronto, where he lives, has been around 27 degrees and 70% humidity the last few days. That's around 7 degrees and 20% humidity above the typical office climate of around 20 degrees and 50% humidity. That difference can result in roughly 20% lower dissipation power if the temperature at the heatsink is around 50-60 degrees which it appears to have been historically. That 20% extra dissipation p…

What’s to say he didn’t perform the benchmarking in a room with AC?

Re: MacBook Pro with i9 chip is throttled due to thermal issues, claims YouTuber

#196
post #114

The biggest shock for me with these laptops came when I tried to do some light gaming. I'm not talking about recent titles either, my 2017 MBP gets bought to the brink by KSP at minimum settings with no mods. I understand that I would be quite rightly criticised for trying to run something like Fortnite but we're talking about a game here with roots in 2013. The hardware they put inside the later models has no hope i…

KSP can lag on my desktop with a 1080ti. Don't feel too bad.

KSP is largely CPU intensive, the GPU barely matters (You can run KSP on maximum settings on a RX460 very comfortably with low parts numbers)

Re: MacBook Pro with i9 chip is throttled due to thermal issues, claims YouTuber

#197
Louis Rossmann made a video[1] a while ago presenting how badly optimized is the cooling on new MacBooks. In short: Apple prefers their MacBook CPU and GPU to run hot and thermally throttle so that the user is happy because the machine is quiet, and then, more importantly, Apple is also happy, because when it overheats often it has a shorter lifespan so you’ll have to buy a new MacBook after 2-3 years.

https://www.youtube.com/watch?v=wgeh7ZJRhZU

edit: Bear in mind these videos are about new MacBooks so there's no way to predict their usual lifespan. And I'm not saying all of them die after 2-3 years. Apple is simply optimizing for the 90% of users here, people doing mostly web browsing and using Microsoft Office. This does not put a sustained load on the CPU/GPU so these users will be fine.

Re: MacBook Pro with i9 chip is throttled due to thermal issues, claims YouTuber

#198
There is another video [1], in which a 2017 i7 outperforms a 2018 i9 in video compression due to its severe throttling. Sure the benchmarks look great and are better on the i9, but as someone mentioned, that's like looking at sprint compared to a longer race.

[1] https://www.youtube.com/watch?v=ip-sZfWaVo0&t=04m37s

Re: MacBook Pro with i9 chip is throttled due to thermal issues, claims YouTuber

#199
I suspected as much which is why I didn't bother with the ~£300 upgrade from the default 2.6Ghz i7 to the 2.9Ghz i9.

The MBP already struggled with the old i7 and with no redesign I couldn't see how they could handle the i9 without extreme thermal throttling. Turns out they can't but ship it anyway!

Re: MacBook Pro with i9 chip is throttled due to thermal issues, claims YouTuber

#200
post #109
post #99

Earlier quoted context omitted.

What? They're CPUs. They're designed to run instructions. Intel's chips spend more energy on the really fancy stuff like huge reorder buffers and extensive speculation. They get higher IPC at lower MIPS/watt. An i7 isn't going to run iOS more slowly than whatever Apple calls their latest ARM SoC. It _is_ going to blow its lid without a big ole heatsink brick on there and a fan too, which is why smartphones use ARM co…

Not all instructions (or instruction sets) are equivalent.

There is nothing inherently energy efficient about x86 or ARM instructions sets, the silicon merely optimizes for different performance.

[ https://ieeexplore.ieee.org/abstract/document/6522302/ ]

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