ZALMAN CNPS7700-Cu CPU Cooler, supports Intel Socket 478/775 (Celeron and Pentium 4: Willamette, Northwood, Prescott) and AMD Socket 462 (Duron, Athlon, Athlon XP) and Sempron/Athlon 64 (Socket 754/939/940), Pure Copper, 2-Ball bearing, Speed:1,000 ~ 2,000 rpm, Thermal Resistance: 0.19 ~ 0.24 °C/W, Noise Level: 20 ~ 32 dB, Adjustable fan speed controller (FAN MATE 2) enables control of noise and fan performance