Zalman Tech CNPS9500 AT CPU Fan CPU Heatsink and Fan - CPU Heatsink and Fan, Manufacturer: Zalman Tech, UPC: 8238840905120, cooling system thermo-regulated (controlled by PWM) for Intel ® LGA775 ZALMAN - CONTROLED PWM CPU Cooler - CNPS9500-ATPoduit specific only for motherboards based CPU LGA775 Intel ® Pentium D, Pentium 4 or Celeron CNPS9500 AT