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tubeexperience

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Feb 17, 2016
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Apple's new MacBook Pros are heavily discussed right now and there are multiple reports about problems with severe CPU throttling. Our initial benchmarks with the new 13-inch model (here in review) were not very reassuring, so we were eager to see how the larger MacBook Pro 15 2018 handles the new CPU. We just received the device and performed some benchmarks, and the results are disappointing.

Our test model is equipped with the Core i7-8850H, which is the second fastest option for the new MBP 15. It offers two more cores than the predecessor, so we expected a significant performance advantage over the old quad-core processors you find in the 2017 MacBook Pro 15. However, the advantage is very small. Even a single Cinebench R15 Multi run is too challenging for the cooling solution and the MBP 15 just manages ~950 points. For comparison: The current Dell XPS 15 with the supposedly slower Core i7-8750H scores more than 1200 points.

The performance drops further after the initial run and the average result after 36 runs is just 832 points. This means the advantage over the MacBook Pro 15 2017 with the quad-core Core i7-7700HQ is just 13%, and the difference should be even smaller the more runs we perform. A comparison with the current Dell XPS 15 9570 is interesting as well, because its current quad-core Core i5-8300H is basically on par except for the first run. The situation is even worse for Apple when we look at the Dell XPS 15 with the Core i7-8750H. It suffers during the Cinebench loop as well, but is still 5% faster after 50 runs compared to the best score of the MacBook Pro 15. The XPS 15 with the less expensive processor is almost 18% faster on average. This is a real slap in the face for Apple, because some users of a so-called Pro laptop require steady CPU performance. Not everybody is just watching YouTube videos, browsing the web or writing mails.

[...]

https://www.notebookcheck.net/The-n...nd-clearly-beaten-by-the-XPS-15.317264.0.html
 
There is a story on 9To5Mac this morning where the guy uses Xcode to disable 2 of the 6 CPU cores on his machine and his render completes faster without them.

And Apple is selling the i9 to people as a $300 "upgrade" when even the i7 is too hot/powerful for the MacBook chassis.

How could this happen? How did no one at Apple, at some point along the way, stop and ask, "Should this CPU really be running at 100C and choking at only 75% of its base clock?"

It's shameful. Someone needs to be fired. It's bad enough that the stock i7 is a throttled mess, but selling people the even hotter and more power-hungry i9 in place of it, that's criminal. Or ought to be.
 
I might get shot down in flames but the thermal performance of the 2016-2018 case is absolutely terrible. These chips could (personal opinion is they clearly would) perform better in the 2015 form factor.
 
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There is a story on 9To5Mac this morning where the guy uses Xcode to disable 2 of the 6 CPU cores on his machine and his render completes faster without them.

And Apple is selling the i9 to people as a $300 "upgrade" when even the i7 is too hot/powerful for the MacBook chassis.

How could this happen? How did no one at Apple, at some point along the way, stop and ask, "Should this CPU really be running at 100C and choking at only 75% of its base clock?"

It's shameful. Someone needs to be fired. It's bad enough that the stock i7 is a throttled mess, but selling people the even hotter and more power-hungry i9 in place of it, that's criminal. Or ought to be.


Heatgate!!!! You heard it here first.

But seriously, this is unacceptable.

I have a 2017 nTB and it is louder than a Boeing 747 under load but at least it can do it all day.
 
I might get shot down in flames but the thermal performance of the 2016-2018 case is absolutely terrible. These chips could (personal opinion is they clearly would) perform better in the 2015 form factor.

I posted this elsewhere this morning, but I was curious so I tested my 13" 2016 w/ Touch Bar this morning. It's the i5 2.9Ghz version. I was surfing the web and listening to some music (streaming SiriusXM), and I fired up Prime95 and started the blended test. That didn't seem to be taxing the system enough, so I switched to the test that says it will create the maximum amount of heat and power consumption.

That still didn't seem to be stressful enough, so I opened a terminal and created additional load with the 'yes' command (repeated 4 times):

Code:
yes > /dev/null &

The CPU pegged at 3.1Ghz turbo and stuck there. The fans were running at 5000rpm the entire time, and temps were stable in the low 90s. I let it run that way for 15 or 20 minutes while I surfed the web and listened to music and the system remained totally fluid and responsive the whole time. The CPU never budged from 3.1Ghz or even came close to throttling. Ambient temps maybe 74 or 75F.
 
Why not give your thoughts about what you have posted rather than just posting a quote/link?

Agree/Disagree?
Implications?
How it affects you and your purchase choices?
Something...

The 6-cores/12-threads MacBook Pro 15" is barely faster than the 4-cores/8-threads Dell XPS 15.

The 6-cores/12-threads Dell XPS 15 easily beats the 6-cores/12-threads MacBook Pro 15".

That's a big slap in the face for someone buying the new MacBook Pro 15".
 
I might get shot down in flames but the thermal performance of the 2016-2018 case is absolutely terrible. These chips could (personal opinion is they clearly would) perform better in the 2015 form factor.

Except that you are wrong. Thermal performance of the 2016+ chassis is significantly better than that of the previous chassis. This has been widely shows by various reviews and tests and it also confirms my own finding (in my tests using multi-core statistical computations the 2015 throttled but the 2016 and 2017 did not).

I wrote this before in the main throttling thread, but it probably makes sense repeating: I find it very puzzling that the MBP fares better than the Dell XPS 15" in cooling the Skylake and Kaby Lake chips (where Dell throttles and MBP doesn't), but performs so much worse with Coffee Lake (the cooling system of both laptops remained unchanged as far as I know). This is the reason why I hope that the issue is a bug in power management firmware which can be fixed.
 
The 6-cores/12-threads MacBook Pro 15" is barely faster than the 4-cores/8-threads Dell XPS 15.

The 6-cores/12-threads Dell XPS 15 easily beats the 6-cores/12-threads MacBook Pro 15".

That's a big slap in the face for someone buying the new MacBook Pro 15".
I actually have a XPS 15 (9560) with the 4 core 7700HQ being shipped to me today from the Dell Outlet. I was able to get a 7700HQ/16GB/512GB/4K model from Dell Outlet for $1,149 AND 16% cashback on top of that from ebates last night. The shipping label has already been created and is scheduled to be delivered on Saturday.

I still have my base 15" 2.2 MBP 2018 at home... Going to compare the two devices over the next week and decide what to do. I don't do any photo or video editing, so the small downgrade in processor isn't going to hurt me much if any at all. Would be hard to lose OSX, but I think I could live with it since I'm looking at saving well over $1,000 even with the student discount.

However, if I run into build quality issues with the XPS, it is going back immediately. Going to be an interesting next week or so.
 
I might get shot down in flames but the thermal performance of the 2016-2018 case is absolutely terrible. These chips could (personal opinion is they clearly would) perform better in the 2015 form factor.

Not sure about that. My 2015 15" thermal throttles under high continuous loads.
[doublepost=1532018597][/doublepost]
Except that you are wrong. Thermal performance of the 2016+ chassis is significantly better than that of the previous chassis. This has been widely shows by various reviews and tests and it also confirms my own finding (in my tests using multi-core statistical computations the 2015 throttled but the 2016 and 2017 did not).

I wrote this before in the main throttling thread, but it probably makes sense repeating: I find it very puzzling that the MBP fares better than the Dell XPS 15" in cooling the Skylake and Kaby Lake chips (where Dell throttles and MBP doesn't), but performs so much worse with Coffee Lake (the cooling system of both laptops remained unchanged as far as I know). This is the reason why I hope that the issue is a bug in power management firmware which can be fixed.

Do we know the cooling system is exactly the same? We know they had to redesign and move other components to fit the new bigger batteries.
 
Do we know the cooling system is exactly the same? We know they had to redesign and move other components to fit the new bigger batteries.

Good question. From iFixit teardown, looks the same. But who knows, de devil is in the detail. I certainly hope they didn't make it worse :D
 
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Heatgate!!!! You heard it here first.

But seriously, this is unacceptable.

I have a 2017 nTB and it is louder than a Boeing 747 under load but at least it can do it all day.

You don't understand.

What most pros want are laptops that are paper thin laptops and throttle a lot. /s
 
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Except that you are wrong. Thermal performance of the 2016+ chassis is significantly better than that of the previous chassis. This has been widely shows by various reviews and tests and it also confirms my own finding (in my tests using multi-core statistical computations the 2015 throttled but the 2016 and 2017 did not).

I wrote this before in the main throttling thread, but it probably makes sense repeating: I find it very puzzling that the MBP fares better than the Dell XPS 15" in cooling the Skylake and Kaby Lake chips (where Dell throttles and MBP doesn't), but performs so much worse with Coffee Lake (the cooling system of both laptops remained unchanged as far as I know). This is the reason why I hope that the issue is a bug in power management firmware which can be fixed.

Good - some real world testing. However the notebook check reviews show throttling is common place across all manufacturers - it’s all about what levels of throttling people experience, which should lie in software.
 
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I made a post about this because I didn’t see yours… I am very curious about how the 2018 entry-level (2.2GHz 6-core) compares to last years entry-level? The MacBook Pro 15 2017 (2.8 GHz, 555) or even the 2.9GHz, 560? Would be interesting, especially for potential buyers of the 2018.


2.6GHz 6-core only slightly faster than 2017 (2.8 GHz, 555) entry-level

https://www.notebookcheck.net/The-n...nd-clearly-beaten-by-the-XPS-15.317264.0.html

“50% more cores for 13 % more performance.”

“The performance drops further after the initial run and the average result after 36 runs is just 832 points. This means the advantage over the MacBook Pro 15 2017 with the quad-core Core i7-7700HQ is just 13%, and the difference should be even smaller the more runs we perform.”
 
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