Specifically the last worked very well on this one fan that would get noisy after a while. I had 1/2 liter left of synthetic engine oil and tried a drop of that and its now been 1 year and fan is ...

Although the case has its own fan controller bus, with a 'quiet' mode button, I decided to hook the fans up to the three chassis fan headers on the mobo. And holy schmoly are these three fans noisy, ...

4-blade fans are designed to offer a good balance of airflow and quiet operation. With four blades, these fans can move air efficiently while creating less noise compared to fans with more blades.