Xigmatek Apache II CD903 CPU Cooler CAC-D91A0-U05 Black Unique radial fin design increases thermal dissipating area and improves airflow, all in a small footprint package Powerful 90mm PWM controlled fan provides efficiency along with massive 61.25CFM airflow Designed for silent operation - 2500RPM at 28dBA Attractive styling features transparent Xigmatek Orange-bladed fan Easily installs on Intel Socket LGA 775 / 1155 / 1156 / 1150 and AMD FM2/FM1/AM3+/AM3/AM2+/AM2 CPUs Small footprint and easy to install on Intel and AMD CPU based motherboards Easy to install: LGA 775 /1155/1156; AMD K8/AM2/AM3 clip. PWM function to make cooler more efficient. Silent cooling with new powerful 90mm fan.