13 Chapter 1 Product Information7. If installing a dual-core CPU, connect the chassis fan cable to theCHA_FAN1 connector to ensure system stability.1.5.2 Installing the CPU Heatsink and FanThe IntelÆ LGA775 processor requires a specially designed heatsink andfan assembly to ensure optimum thermal condition and performance.Note: The motherboard supports IntelÆ LGA775 processors withIntelÆ Enhanced Memory 64 Technology (EM64T),Enhanced Intel SpeedStepÆ Technology (EIST), and Hyper-Threading Technology.Note: 1. When you buy a boxed IntelÆ processor, the packageincludes the CPU fan and heatsink assembly. If you buy aCPU separately, make sure that you use only an IntelÆ-certified multi-directional heatsink and fan.2. Your IntelÆ LGA775 heatsink and fan assembly comesin a push-pin design and requires no tools to install.3. If you purchased a separate CPU heatsink and fanassembly, make sure that you have properly appliedThermal Interface Material to the CPU heatsink or CPUbefore you install the heatsink and fan assembly.Note: Make sure that you have installed the motherboard to thechassis before you install the CPU fan and heatsinkassembly.