Adding and Replacing Parts 191NOTICE: To prevent static damage to components inside your computer, dischargestatic electricity from your body before you touch any of your computer’s electroniccomponents. You can do so by touching an unpainted metal surface on thecomputer chassis.1 Follow the procedures in "Before You Begin" on page 151.NOTICE: Before you install new memory modules, download the most recent BIOSfor your computer from the Dell Support website at support.dell.com.2 Remove the computer cover (see "Removing the Computer Cover" onpage 153).3 Rotate the hard-drive carrier out of the computer (see "Rotating the HardDrive Carrier Out of the Computer" on page 156).4 If you are replacing a memory module, see "Removing Memory" onpage 189.CAUTION: Fully-buffered memory modules may become very hot during normaloperation. Ensure that memory modules have had sufficient time to cool before youtouch them.5 Press out the securing clip at each end of the memory module connector.NOTICE: Full-length heat spreaders (FLHS) are required for 667 MHz DIMMs.6 Align the notch on the bottom of the module with the crossbar in theconnector.1 securing clips (2) 2 memory connector12