Dell Precision 7920 Owner's Manual page 53

Steps
1. Pull the expansion card latch out of the slot.
2. Hold the expansion card by its edges, and pull the card until the card edge connector disengages from the expansion card
connector on the riser.
Figure 22. Removing expansion card riser 1
Installing expansion card riser 1
About this task
If installing a replacement expansion card riser 1 make sure the VROC key is transfered from the old card to the new
NOTE:
card.
Disassembly and reassembly 53