What case fans do you use? They are 38mm width Scythe model but which exactly they are?
How often do you clean them and how long they work in your farm? I used 25mm Scythe fans with double ball bearing but I have to change a half of them after 1.5 year. Now I use Delta fans of 38mm width and they looks better for me
theyre the scythe ultra kaze fans, these are maybe 1.5 years old and still working fine for me (120mm) which models of scythe and delta fans did/are you using?