The only fan which did not provide enough airflow to keep the system stable was the Papst 92mm at ?low? setting, the SP-94 has a large copper base to use as a buffer zone and this gives it the edge. You might have noticed those 120mm results in the list. Using the 92mm fan clips and some rubber bands you are able to secure a 120mm fan on the heatsink, although I do not recommend it for running 24/7, unless you swap those rubber bands for more stronger gear. The Panaflo 92mm delivers some excellent results, only beaten by the Coolink which is much noisier, and the YS-Tech 120mm. Putting a fan in ?suck? configuration can shaves 1-2°C from your temperature.