TL;DR Buy this fan. Less power and more airflow than 0.6A and 0.66A options. There are 3 versions of fans suitable for the Unibody Mac mini and their ratings are as follows: 12V, 0.50A12V, 0.60 A12 V, 0.66 AMy 2010 Mid-Mac Mini Server the P8800 came with the latter. As a small investment, I bought a 2.3GHz Mac mini i7-3615QM that was released in late 2012. At first this new fan showed signs of a possibly bad fan and I bought the one listed here. Luckily, due to a bad sensor (now fixed), I was pretty familiar with overriding SMC and controlling fans with a custom script. 12V in the housing. Below are the relative speeds: 12V, 0.50A = 115% 12V, 0.60A = 100% 12V, 0.66A = 108% In other words, when tested at 1800 rpm, 2500 RPM, max. ), a fan with less current pushes more air through the case. 15% more air mass means 15% more heat dissipation under otherwise identical conditions. There is a slight harmonic coming from the fan, but that's just the motor's ESC and only noticeable from 5000 rpm.
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