4-16 CRU Replacement and Server Upgrades While ensuring the heat sink is level and secure with one hand, snapone end of the clip down over the corresponding tab on the retentionmodule (3). Then snap the opposite corner clip (4). Snap theremaining end of the clips down over the corresponding tabs (5) (6).Be sure the clip is adequately engaged with the tab. Ensure the heatsink is absolutely level.123456Figure 4-15. Securing the Processor Heatsink12. Attach the CPU air duct removed in Step 5.13. Install the CPU module top cover removed in Step 2, securing it with threescrews.14. Install the CPU module into the system cabinet following procedurespreviously detailed in this chapter.15. Power on the CPU module and reboot the system to ensure POST does notdisplay any error messages. If error messages are displayed, see the POSTerror messages listed in Chapter 5.16. To operate a multi-processor system, do the following:If in “Computer” of Device Manager, [Driver] is set to “ACPI singleprocessor PC,” change it to “ACPI multi-processor PC” and restart theserver to update the system.Removing a Processor1. Remove the appropriate CPU module from the server chassis. See Removinga CPU Module earlier in this chapter.2. Remove the top cover of the CPU module. See Installing a Processor earlierin this chapter.3. Locate the processor on the CPU board. See Installing a Processor earlier inthis chapter.4. Remove the CPU air duct. See Figure 4-9.
