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The user goes on to explain that one of the internal power limits set for the device may not be appropriate for the power consumption of the CPU and identical to previous models MacBook Pro, causing the power delivery chip (known as voltage regulation module, or VRM) to signal an over-power condition that forces the CPU clock to reduce the amount of power. 39; diet. This creates the same conditions to allow the throttling to occur again.
These conditions may arise due to the new six-core design of the i9 CPU shown here. While Intel was increasing the number of CPU cores, they were not increasing the thermal computing power (TDP), nor the amount of power dissipated that builders would expect to have to cool for proper design. CPU. This is a problem because this number usually reflects normal use and ignores turbo modes. It is also likely that it may exceed the number of processors in the previous four cores given the similarity of the clock speeds and process nodes on which they are used.
A method to adjust this limit is provided in the publication, but it requires you to run a command manually or via a script each time the computer starts, and would probably void the warranty if the Apple technicians the discovered. However, the user publishes the performance test results showing successive passes without limitation. Manufacturers will always quote reduced component lifetimes likely if they are used outside of their specifications, but the results seem stable, and there is no CPU thermal limitation, the supposedly original cause of this problem .
This patch will not deal with the system's total power consumption becoming excessive, such as the long CPU and GPU CPU loads, but it is possible that Apple may issue a correction similar to that described in the post. Reddit who is stable.
As to whether this problem is related to the hardware design of the MacBook Pro, it is also possible. Although the complete disassembly of the current iFixit 15-inch MacBook Pro is not yet available, the previous disassembly reveals significant differences in the VRM chips that power the GPU and the CPU of the device.
The GPU power supply components seen above are on the top of the logic board near the chip GPU, and a thermal grease can be visible on the components, indicating that they interfere with the heat sink of the device. This is in contrast to the same components for the CPU, which are shown on the back side of the logic board with no thermal interface to the top of the package, as seen below.
In addition, the publicly available data sheets for these parts indicate more differences that suggest that their thermal profiles will be different. The International Rectifier portion of the GPU has lower thermal resistance, which means that it can better dissipate its heat in the surrounding areas (card, air, radiator) than the Intersil portion for the CPU. In addition, it boasts superior energy efficiency, which means it dissipates less energy to provide the same amount of power as the Intersil part.
With the provided heat dissipation path for IR parts, it is clear that they will not be able to drive the same amount of charge in any supported mode. This makes sense since GPUs can display high loads for longer periods, but this could be an improvement for Apple's future MacBook Pro models, especially since it usually chose GPUs with very similar thermal power limits (TDPs). his line MacBook Pro
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