Bought this fan and other silent fans from Noctua also because of the silence. You pay for what you get, but with this fan it really is. It pushes air out, but not to cool monster machines. However, if you use this fan for its intended purpose, it's great. Keeps my tower cool and quiet. I have an Intel 920, Nvidia GTX 780, two hard drives and a 1000w PSU. I use this fan on my CPU. I have the same but 140mm for the PSU and several same fans without PWM for the case. My room temperature is 78 degrees all the time and these fans keep my computer quiet even when I'm playing games like BF4. I never hear the fans and my GPU fan never needs to speed up. Sometimes this fan runs at higher speed on the CPU and I can hear it compared to other fans, but it is silent. what else can i say Big fans.
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