Quiet at idle with decent airflow. They were actually so quiet that when RGB was unplugged I had to watch to see if they were spinning when set to 60%. You will be heard 100 percent, but no worse than other fans. The build quality turned out to be much better than I expected. They feel solid and the rubber pads were a nice touch. They are far superior to what Deepcool uses in their cases. I didn't get them for RGB but the colors look decent. Two fan hubs (no controller) were absolutely necessary as the motherboard I bought (X570) had all the fan connectors on the bottom and the fan cables weren't long enough. Very cool, if you're reading right now you might want to increase the length of the fan cables in future products. In conclusion, I can say that I would buy them again without hesitation.
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