Lenovo ThinkStation PX Hardware Maintenance Manual page 124

Note: Do not change the graphics card slot installation location if you replace a GeforceRTX 4080 graphics
card.
For access, do the following:
1. Remove the left side cover. See "Left side cover" on page 72.
2. Remove the CPU duct. See "CPU duct" on page 75.
3. Remove the power cable from the PCIe card, if any.
Removal steps
Remove the full-length PCIe card.
Note: The card might fit tightly into the slot. If necessary, alternately move each side of the card a small
amount until the card is removed from the slot.
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PX Hardware Maintenance Manual