8-6 Dell Workstation Midsize Systems User’s GuideUse the following procedure to install a DIMM (see Fig-ure 8-7):1. Locate the plastic securing clips at each end of thesocket. Press the clips outward until they snapopen.2. Press the DIMM straight down into the slot run-ning down the center of the socket until thesecuring tabs snap into place around the ends ofthe DIMM.Figure 8-7. Installing a DIMMRemoving a DIMMTo remove a DIMM, press the securing clips outwardsimultaneously until the DIMM disengages from thesocket (see Figure 8-8). It should pop up slightly.Figure 8-8. Removing a DIMMMicroprocessor UpgradesTo take advantage of future options in speed and func-tionality, you can add a second processor or replace eitherthe primary or secondary processor.Each processor and its associated L2 (level-2) cachememory are contained in an SEC cartridge that isinstalled in a dedicated socket on the system board. Insystems with only one processor, a terminator card isinstalled in the secondary processor socket. The follow-ing subsection describes how to install or replace an SECcartridge in either the primary or secondary processorsocket.Adding or Replacing a MicroprocessorThe following items are included in a microprocessorupgrade kit:• The new processor SEC cartridge with attached heatsink• Two heat sink securing thumbscrewsNOTE: Dell recommends that only a technically knowl-edgeable person perform this procedure.1. Remove the computer cover according to theinstructions in “Removing the Computer Cover”in Chapter 7.2. Rotate the power supply as described in “Rotat-ing the Power Supply Away From the SystemBoard” in Chapter 7.3. Remove the airflow shroud from the processor(s).Squeeze both pairs of tabs on top of the shroud andlift it up and away from the processor SEC car-tridge(s) (see Figure 8-9).securingclips (2)2.1.CAUTION: The second processor must be of thesame type and speed as the first processor.CAUTION: See “Protecting Against Electro-static Discharge” in the safety instructions atthe front of this guide.
