1. Installing Internal Optional Devices
Express5800/B120f User's Guide
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Chapter 2 Preparations
8. Bring the socket lever to its original position. First place the lever on the side marked as "Lock", then
place the lever on the other side.
9. Put the heat sink on the CPU.
Take care not to touch the cool sheet with your hand.
Important
Install the heat sink in correct direction as shown in the figure below.
Front
Rear