The StarTech.com Slot 1 Pentium II/III CPU cooling fan is a combination heatsink and fan designed for cooling Intel Pentium II and III CPUs that use the newer SECC2 cartridge. A quiet running 5cm brushless ball bearing DC motor coupled with a high-efficiency blade design is capable of moving 9 CFM (cubic feet per minute) of air. Power is supplied to the fan using a 3-lead TX3 connector that plugs into the motherboard and allows the system to monitor fan speed and operating status.