Outstanding! That is the only word to describe this extremely high air flow, ultra low noise 140mm pressure orientated cooling fan. Designed to get the best performance from your CPU heatsink, without the noise associated with most high CFM fans, this Blue Vortex 1000RPM fan pushes a colossal air flow of 87CFM for an ultra quiet 18.1dBA! A three pin to four pin peripheral connector adapter is also included, so you can run this fan off either a three pin header, or connect it directly to your PSU. With a starting voltage of 7v and a maximum voltage of 13.8v, this fan is perfect for connecting to your fan controller so that you can lower or raise the RPMs as required based on PC loading and thermal output.