We recently commented that new MacBooks Pro did very well in tests of benchmarkshowing the power of architecture “Coffee Lake” Intel's new chips on these computers.
All this power caught the eye of the YouTuber Dave Lee, which published a video yesterday (17/7) reporting a potentially complicated situation of the MacBook Pro's top-of-the-line custom model: software "drowning" when the chassis overheats.
Lee explains that after a few seconds of high intensity work (such as editing in Adobe Premiere Pro), the system starts to drown and the speed of clock dramatically reduced processor And no, I'm not talking about Turbo boost which on the 15 inch model can reach 4.8GHz with the i9 chip from Intel but the basic speed of the clock, which is 2.9GHz.
This i9 chip in MacBook Pro can't at least maintain the base speed of the clock. Forget the Turbo boost, he can't even maintain the speed of the clock of 2.9GHz, what a nonsense. This CPU has a chip capable of overclockingBut all that CPU potential is wasted inside that chassis or more, the cooling solution that's in here.
During the test, the new MacBook Pro took almost 40 minutes to render a video, while the previous 2017 model was able to perform the same task in 35 minutes. Although Premiere Pro is not well optimized for macOS, the difference between the two MacBook Pro models is notable.
To understand how overheating affects computer processing, Lee did another test with the same editing software, but this time with the MacBook Pro inside a freezer (yes, he did it). In this test, the notebook rendered the same video in just 27 minutes and 18 seconds, indicating how much this issue affects machine performance.
As emphasized by the 9to5MacThis is just a test using a single MacBook Pro and a specific application, so it is not possible to know if this is a problem for most 15 ″ models powered by the Intel i9 chip or not. Anyway, we will continue to follow possible future reports to better understand this situation.
Note that originally the high-end model of the new 15 ″ MacBook Pro comes with a 2.6GHz Intel Core i7 chip. To get the 2.9GHz Core i9, I need to customize the machine by paying $ 300 more for it (in the US).
Update 07/19/2018 s 09:20
According to new tests released by the AppleInsider and at 9to5Mac, the 15-inch MacBook Pro powered by Intel's Core i9 chip actually undergoes an overheating process that affects the machine's final performance.
O AppleInsider used the software Cinebench 15 to measure notebook performance and the Intel Power Gadget to calculate the speed of the clock. After ten tests, they conclude that, in fact, when the chip reaches the critical temperature of 100C, the speed of the clock CPU speed drastically reduced to 2.02GHz.
Still according to the website, the most obvious solution at the moment is that "Apple changes the maximum processor speed by adjusting the power the chip receives". Ironically, slowing down the maximum processor speed may allow the processor to complete tasks faster since it maintains the ideal processor temperature.
J o 9to5Mac ran the software Final cut pro (Apple's own) to export a 4K video at 60fps and the same software from Intel to measure the speed of the clock. During the process, the machine went into an idle period, in which the speed of the clock CPU speed reached 800MHz. Although this period in which the machine waits to perform some task is common, in MacBook Pro it is directly linked to a thermal issue.
With these further tests it can be understood that, in fact, Apple should check this issue that affects the new MacBooks Pro with such configurations. We can only wait for an official response if it comes.