Lenovo ThinkStation P620 User Manual page 63

Install PCIe cards according to the corresponding slot types and the following illustrated installation order:
Figure 2. PCIe card installation order
Replacement procedure
1. Remove the computer cover. See "Computer cover" on page 26.
2. Lay the computer on its side for easier access to the system board.
3. Open the latch in the front fan assembly and remove the PCIe card retainer.
Note: The PCIe card retainer is only available on some models.
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Chapter 6 CRU replacement
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