Lenovo ThinkStation P920 Hardware Maintenance Manual page 162

5. To remove a memory module, open the retaining clips and gently pull the memory module out of the
memory slot.
Figure 103. Removing the memory module
6. To install a memory module, do the following:
a. Open the retaining clips of the memory slot into which you want to install the memory module.
Figure 104. Opening retaining clips
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P920 Hardware Maintenance Manual