Shortly thereafter, the temperature hit 100C, with a drop in clock speed maintained at 3.5GHz, still above the 3.2GHz base clock. Shortly after starting the first test, the CPU clock speed shot up to a maximum of 4.26GHz. The office was a steady 21C throughout the duration of the test.
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The Mac mini was well-ventilated without a fan blowing on the exterior of the case at all. We ran Cinebench R15 5 times back-to-back without letting the processor cool down, while also looking at the processor's clock speeds and temperatures to see if it's throttling. We tested the i7 Mac mini using the same exact CPU stress test that we ran on the 2018 i9 MacBook Pro. It can even go lower than the normal operating clock speed if need be to prevent damage. As that heat builds faster than a cooling system can remove it, the processor will slow down to help dissipate the heat in conjunction with the cooling system. While a processor is cool, it will exceed its base clock speed up to its boost speed. Apple has chosen to use a desktop chip - the i3-8100H, i5-8400B, or the i7-8700B, depending on model.
Processors meant for desktop computers can afford to have a higher TDP, while notebooks, mobile devices, and tablets tend to use processors with lower TDP values, due to the difficulty of cooling the chip down.
Processors also have a rated thermal design profile, based on the heat that the chip generates when at the base speed.
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Luckily, the Mac mini has four Thunderbolt 3 ports so you can easily connect an eGPU that's even more powerful than the graphics in the MacBook Pro for less than $500 more.įor about a decade, Intel processors have had two speeds - a base speed, and a higher "turbo" speed that the chip can maintain as long as thermal conditions allow. We see the same results in Unigine's Heaven benchmark, where the Mac Mini scored 193 points compared to 450 on the MacBook Pro and 1,831 on the iMac Pro.
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