MacBook Pro 2018

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Steve Clevenger | Forum Activity | Posted: Sat, Jul 21 2018 3:31 PM

How is Logos7 running on the new MacBook Pro 2018 with the new eighth-generation Intel 6‑core processors?

Thanks

Posts 701
JH | Forum Activity | Replied: Sat, Jul 21 2018 6:18 PM

Performance reports are trickling in...

https://www.macrumors.com/2018/07/17/core-i9-chip-macbook-pro-throttling/

Posts 2829
Don Awalt | Forum Activity | Replied: Sun, Jul 22 2018 3:57 PM

It appears from sorting all the testing going on right now, that there are two serious problems with the 2018 MBP product line. First, the Intel CPU used is rated to draw approximately 45 watts in order to stay within maximum temperature - this measurement being called Thermal design Point, or TDP. In tests, the CPU is drawing in excess of 70 watts, way over spec. This causes the heat to rise very quickly to the 100 degree Celsius point, where throttling will begin - which slows the CPU down - and for a CPU rated (top end model) at 3.1 GHz with turbo boost to 4.8 GHz, it runs as low as 800 MEGA Hz. 

Because of the wattage and heat problems, even in simple tests the CPU cannot maintain its base 3.1GHz rating, and it is very likely that any significant turbo boost will ever be seen for more than a few seconds. So most models (except the low-end MBP's will run slower than prior year models. Testing with utilities that hard-cap the wattage draw at around 45 watts, and also turn fans on max and keep them there (more aggressive cooling), improve performance considerably, proving the point. Without these 3rd party bandaids, you see CPU frequency, power draws, and temperates fluctuating wildly within the space of a second!

All of this of course will likely cause long term wear and tear - running the fans a lot hits battery and mechanical issues, excessive heat due to poor power management wears the CPU/system out.

This is all confused by the fact that some of the simple CPU tests either don't exercise all the cores to their full extent, or do not run long enough, so their performance looks good. But make no mistake, this release of MacBook Pros is a mess and should be avoided at all costs - this story has a long way to go seeing what Apple does about it.

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PetahChristian | Forum Activity | Replied: Sun, Jul 22 2018 4:09 PM

Don Awalt:

this release of MacBook Pros is a mess and should be avoided at all costs

I agree that this release is a mess, but it’s the Core i9 configurations that have a serious issue. The lower-end 15” and 13” configurations are ok, as far as I know. I don’t think the entire lineup needs to be avoided.

Posts 2829
Don Awalt | Forum Activity | Replied: Sun, Jul 22 2018 5:26 PM

PetahChristian:
The lower-end 15” and 13” configurations are ok, as far as I know. I don’t think the entire lineup needs to be avoided.

Apple has not commented yet, but from user tests this does not seem to be true, at least there is risk it's not true, which is why my recommendation is to avoid them ALL at least until this sorts itself out in some conclusive way. There are lots of tests being run on both size MBPs disproving the health of even baseline configurations of the MBP 13 and 15 - here are two examples.

These two graphs show the fluctuation in power (well above 45 Watts which should not happen) and CPU frequency (cannot hold its base 2.2 GHz frequency) on the 15 (first graph), and to a lesser degree the MBP 13 fluctuation in CPU frequency (unable to hold its base frequency (the horizontal line across the graph, looks like 2.2 GHz)). Both models are the base configurations of each. Notice the base config 15" MBP is running a CPU at only 800 MHz at this point in the stress test. That is horrible. BTW the issue is NOT CPU throttling, they all do it - the issue is when throttling goes below the base frequency of the CPU, which should only happen in extreme catastrophic situations.

One last point - see all the jagged lines on both? Shouldn't happen, a huge indication something bad is going on. You run these tests on prior year Macs (and other computers), the lines are mostly solid - may be solid across the graph, solid ramping up or down depending on the graph, but this jagged stuff is deadly for computer performance short and long term. This is really a bad issue.

Posts 2829
Don Awalt | Forum Activity | Replied: Tue, Jul 24 2018 1:58 PM

Fixed! Testing is proving the fix is good. In short, they updated the power drawn from the Voltage Regulators on the system board, which causes the laptop to run cooler and stay within spec'd speeds. Performance up, temps down, more consistent in all phases. Success. Buy away! This will now be a killer laptop as it performs to spec.

https://9to5mac.com/2018/07/24/apple-releases-2018-macbook-pro-update-to-fix-cpu-throttling-thermal-management-bug/

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