The Xigmatek HDT-SD964 will beat out passive CPU coolers, but it’s performance isn’t going to help you overclock.  The ~20dB of noise that the cooler creates certainly won’t intrude on your ears, making this a great cooler for a quiet system.  CPU3D even thinks that with a higher speed 92mm fan, you would see a big improvement on the temps, with little effect on the noise produced.

“The Xigmatek HDT-SD964 installed with its low rpm 92mm fan, is one of the quietest CPU coolers we’ve tested to date … hardly a murmur.”

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