Product Detail Fits most PCs with 3.125" (80mm) fan receptacles Alloy sleeve with a ceramic shaft 31.65 cfm air volume, 26.34 dBA noise level 12V rated; 2500 rpm operating speed 300,000 hours life expectancy . The "DYNEX 80mm case/CPU fan" is best product for you. We recommended DYNEX 80mm case/CPU fan