Amazon.com: ARCTIC F12 TC - 120 mm Case Fan with Temperature Control, Quiet Motor, Computer, Fan Speed: 300-1350 RPM - Black, White : Electronics
Amazon.com: ARCTIC F12 PWM PST - 120 mm PWM PST Case Fan with PWM Sharing Technology (PST), Very quiet motor, Computer, Fan Speed: 230-1350 RPM - Black/White : Electronics