Compaq Deskpro EX User Manual page 49

Before installing a fansink, prepare for its installation by doing one of the following:
New heatsink: if the heatsink has a thermal interface attached to its bottom, peel off the
protective paper before installing the heatsink, if necessary.
Reinstalled heatsink: Note where the thermal interface is located on the heatsink. Carefully
remove the thermal interface pad and all residue from the heatsink surface. If any thermal
interface remains on the die of the processor, scrape it off with your fingernail. A Q-Tip
dipped in alcohol can be used to clean both surfaces. Add thermal interface pad to the bottom
of the heatsink before reinstalling the original heatsink to insure an efficient thermal interface.
CAUTION: Thermal interface heat transmission is reduced if residue remains on the heatsink or
processor, or the heatsink thermal interface surface is scratched. This could lead to the processor
running at a higher than normal temperature, fan turning at a higher than normal speed, and
possible loss of data if processor shuts down from overheating.
Ensure that the pins on the processor are properly aligned before inserting the
processor in the ZIF socket. Two corners of the processor will not have an
outermost pin.
All units with 866 MHz and faster processors require an active fansink. When
installing the fan, make sure it is positioned so it blows down on the processor.
All units with 866 MHz and faster processors require use of a chassis fan
(Section 4.15).
Compaq Deskpro EX Series of Personal Computers 4-25