User's Guide

1. Installing Internal Optional Devices
Express5800/R120f-2M User’s Guide
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Chapter 2 Preparations
9. Lightly push the CPU to the CPU socket, and close the plate.
10. Close the socket lever marked with "← " to fix it.
11. Close the socket lever marked with "
→" to fix it.
12. Put the heat sink on the CPU and fix the heat sink with four screws.
Temporarily tighten the four screws diagonally, then tighten them securely.
Make sure that the screw aligns with the screw hole. If not, the screw may damage the motherboard.
Also pay attention not to touch the component around the CPU socket when putting the heat sink.