4 Configuring the system50Upgrading the CPUThis section includes instructions for removing and installing a CPU.Important! Always observe the ESD precautions when installingor removing a system component. Refer to page 40.Removing a CPU1 Remove the system cover. See “To remove the top panel” on page43.2 Locate the CPU/heatsink/air-baffle assembly on the mainboard. See“Mainboard layout” on page 9.Warning! The heatsink may be very hot. After opening thesystem, allow the heatsink to cool for several minutes ifthe system was operating before you removed the cover.3 Remove the air-baffle from the heatsink, as shown below.