techPowerUp! posted a review on the Scythe Katana Cu cooler

With the Katana Cu Scythe has delivered a very solid all copper cooler that has excellent cooling performance. It uses a 92mm fan with an integrated fan speed controller. When the fan speed is turned all the way down the noise is reduced to an inaudible 30% of full speed, yet temperatures under load are only increased by 3 degrees celsius.

Scythe Katana Cu Review