Socket type 754, 939, 940, AM2, F AMD CPU clock speed (maximum): Sempron? (up to 89W): Socket 754 (3400+, 2.0GHz) Socket AM2 (3800+, 2.2GHz) Athlon? 64 (up to 89W): Socket 754 (3700+, 2.4 GHz) Socket 939 (4000+, 2.4 GHz) Socket AM2(4000+, 2.6 GHz) Athlon? 64 FX (up to 89W): Socket 939 (FX-53, 2.4GHz) Socket 940 (FX-53, 2.4GHz) Athlon? 64 x2 dual-core (up to 89W): Socket 939 (4400+, 2.2 GHz) Socket AM2 (5600+, 2.8GHz) Phenom? x2 quad-core (up to 89W): socket AM2 (9100e, 3.2GHz) Opteron? (up to 89W): Socket 939 (150, 2.4 GHz) Socket 940(150, 2.4GHz; 250, 2.4GHz; 850, 2.4GHz) Dual-core Opteron?(up to 89W) socket 940 (275HE, 2.2GHz; 875HE, 2.2GHz) Second-generation opteron? (up to 89W) Socket AM2 (1218HE, 2.6GHz) Socket F (8218HE, 2.6GHz; 2218HE, 2.6GHz) Third-generation Opteron?(up to 89W): socket F (8356, 2.3GHz; 2356, 2.3GHz) Cooler dimension: 77 x 83.5 x 71mm Cooler weight: 371g Fan: Bearing type 1B1S/entering bearing Rated voltage: 12V DC Dimension: 80 x 80 x 25mm Speed: 2000rpm (+/- 10%) Airflow: 26.0cfm (+/- 10%) Noise: 20dBA Interface material high efficiency thermal compound