Tyan Computer THUNDER N3600QX - Manual (Page 19)

Place the heat sink on top of the CPU
and secure it to the motherboard using
two screws clockwise.
19
2.5 - Heat sink Installation
After installing the processor, you should proceed to install the heat sink. The
CPU heat sink will ensure that the processor do not overheat and continue to
operate at maximum performance for as long as you own them. The overheated
processor is dangerous to the motherboard.
For the safest method of installation and information on choosing the
appropriate heat sink, use heat sinks validated by AMD. Please refer to AMD’s
website at
www.amd.com .
The following diagram illustrates how to install heat sink onto the CPU of S4987.