HP Z800

Installing a CPU
NOTE: HP recommends that you do not swap processors (CPUs) from one system board to another.
If installing a second CPU, it must be of the same type as the first CPU.
1.
Disconnect power from the workstation (see
Predisassembly procedures on page 77).
2.
Remove the side access panel (see
Removing the side access panel on page 79).
3.
Remove the airflow guide (see
Removing the airflow guide on page 80).
4.
Remove the memory fan assembly (see
Removing the memory fans on page 155).
5.
Remove the CPU heatsink (see
Removing the CPU heatsink on page 199).
6.
Remove the CPU (see
Removing a CPU on page 203).
7.
Using extreme care, fully raise the CPU socket lever and cover.
CAUTION: The CPU socket contacts are delicate. To avoid bending the contacts, use extreme
care when installing the CPU in the socket.
8.
If you are adding a second CPU to a single-processor system, remove the plastic cover from the
second CPU socket.
9.
Align the notches in the CPU base with the tabs on the socket as shown in the following figure.
Seat the CPU into the socket. Ensure that the underside of the CPU is level with the top of the CPU
socket.
10.
Close the CPU cover plate by lightly pressing down on the CPU cover plate while closing the
socket lever.
204 Chapter 5 Replacing components ENWW