The Guru of 3D posted a review on the Cooler Master Hyper N520 CPU cooler
A quote from the article:
>> Cooler Master Hyper N520 CPU Cooler Review
Though the new Hyper N520 CPU Cooler is in all respects in the basis a heatpipe cooler like many others, it is unique. You'll spot a lot of aluminum convection fins mounted to no less than 5 6mm copper heatpipes. To top that off Cooler Master engineered the product with not one but two 92mm cooling fans in mind.
This way they could keep the CPU cooler design a little smaller, yet create a lot of airflow. The end result is pretty interesting looking and performing end product, though not the most silent model it cools quite well and is tagged with a very decent price.
>> Cooler Master Hyper N520 CPU Cooler Review