When I booted my system after installation I needed to see if they were actually spinning. You are so calm. Not only do they have lower noise levels than brands like Corsair, Thermaltake, and Cooler Master, but they also have a wider RPM range than most, move more air compared to other pressure-tuned fans, but they're also part of the only thing I could recommend, buying a 4 pin PWM extension cable (they cost less than $5) so you have a clean wiring option when connecting to the motherboard as the line separation for the serial connection is only about two. inches from the end that connects to the motherboard.
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