I recently bought an Intel i5 3570k for a new PC I'm putting together. I'm really try to keep the noise level to a minimum and I'm looking for a CPU cooler to reduce the noise compared to the stock cooler. I don't intend to overclock, but it would be nice to keep the temps low. I'm also not interested in water cooling. I've heard good things about the Cooler Master Hyper 212 EVO, but I haven't found out much about it's noise levels compared to the stock cooler.
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I'll vouch for the Cooler Master Hyper 212 EVO. You won't hear it over your case and case fans. Especially running low.