Amazon.com: ARCTIC F8 PWM PST CO - 80 mm Case Fan with PWM Sharing Technology (PST), Dual Ball Bearing for Continuous Operation, Computer, Fan Speed: 300-2000 RPM: Computers & Accessories
Amazon.com: ARCTIC P8 PWM PST Value Pack - 80 mm Case Fan, PWM Sharing Technology (PST), Five Pack, Pressure-Optimised, Very Quite Motor, Computer, Fan Speed: 200-3000 RPM - Black: Computers & Accessories