Review on ARCTIC F12 PWM PST CO - High-Performance 120mm Case Fan with Dual Ball Bearing, PST and PWM Technology - Grey by Mario Beckwith

Very impressive fans for the price. Large air volume for its size with a comparatively low noise level. I bought eight of these (Obsidian 900d cabinets) for my new build and they are almost inaudible. Of course, they are all connected to my motherboard's PWM signal, so they have a low duty cycle most of the time. But even while the P95 was running on three cores plus Furmark (the GPU is also water-cooled), they didn't have any cooling issues. I really wanted a ball bearing fan because three of them are mounted horizontally in the top of the case on a 360mm radiator. Ball bearing fans are much more suitable for this installation position than sleeve bearing fans.