Installing The Cpu Heatsink - HP Z800 Maintenance And Service Manual

Installing the CPU heatsink

1. Perform one of the following tasks:
If you are reusing the original heatsink, apply thermal compound to the center of the CPU top
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surface.
If you are using a new CPU heatsink, do not apply thermal compound to the CPU because
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the new heatsink already has thermal compound applied to the heatsink surface. Instead,
remove the thermal compound protective liner from the bottom of the new heatsink.
2.
Align the four mounting screws with the mounting holes in the system board and carefully place
the heatsink on the CPU.
Ensure that the heatsink is placed properly with the fans positioned toward the front of the
workstation.
CAUTION:
threads in the system board tray.
Do not fully tighten one screw and then move on to the next. Instead, tighten all screws a little at a
time, ensuring that the CPU remains level.
3. Tighten all screws partially so the CPU heatsink remains level.
4.
Tighten each set of diagonally opposed screws a little at a time to 6 inch-lbs. of torque as shown
in the following illustration.
ENWW
Do not overtighten the heatsink screws. If you overtighten them, you might strip the
Removing and installing components 201