A blade server with fin heat sink was set as the research object of a cooling experiment and its performance was evaluated via an electronic thermal analysis module from 6SigmaDC software. The heat dissipation of the heat sink was simulated using different equipment parameters in blade server. The analysis concentrated on the effects of influencing factors such as fin height

number of teeth

fin thickness

on the heat dissipation performance of the heat sink. Through a comparative analysis

the optimal structure parameters of fin heat sink and lowest temperature of the chip were obtained through air cooling. Nevertheless

better results were achieved by chip cooling. A water-cooled cold plate model was constructed with the same blade server. In comparison with the temperature of the chip cooled by heat sink

the results indicated that the liquid cooling performance was 1.3 times as that ofthe air cooling. Thus

a hybrid cooling method of air and liquid cooling was proposed to provide a theoretical reference for the cooling design of the blade server.