Owners Manual

a. Partially tighten the first screw (approximately three turns).
b. Tighten the second screw completely.
c. Return to the first screw and tighten it completely.
If the PHM slips off the blue retention clips when the screws are partially tightened, follow these steps to secure the PHM:
a. Loosen both the heat sink screws completely.
b. Lower the PHM on to the blue retention clips, following the procedure described in step 2.
c. Secure the PHM to the system board, following the replacement instructions listed in step 3.
NOTE: Do not tighten the retention screws to more than 0.13 kgf-m (1.35 N.m or 12 in-lbf).
Figure 53. Installing the processor and heat sink module
Next steps
1. If applicable, install the mid drive tray.
2. If applicable, install the air shroud.
NOTE: If applicable, open the PCIe card holder latch on the air shroud to install the full length card.
3. Follow the procedures in After working inside your system.
Expansion cards and expansion card risers
An expansion card in the system is an add-on card that can be inserted into an expansion slot on the system board or a slot on a
riser card to add enhanced functionality to the system through the expansion bus.
NOTE:
A System Event Log (SEL) event is logged if an expansion card riser is not supported or missing. It does not prevent
your system from turning on. However, if F1/F2 pause occurs and an error message is displayed.
Expansion card installation guidelines
The NX3240 system supports up to four PCI express (PCIe) generation 3 expansion cards, that can be installed on the
system board using expansion card risers. The following table provides detailed information about the expansion card riser
specifications:
90
Installing and removing system components