Thermaltake Big Typhoon CL-P0114 12cm 5-in-1 Heatpipe Cooling Solution Fan for Intel P4 LGA 775 and AMD K7/K8 Designed for Intel P4 LGA 775, and AMD K7, K8 6 heatpipes transfer the heat quickly High density aluminum fins provide more surface area for good heat dissipation Copper base solder perfect contact to ensure the best performance 12 cm silent fan performs well at low noise, 16dB only