HP EliteDesk 800 G5 SFF Maintenance And Service Manual page 38

b. If you are removing a PCI Express ×1 card, hold the card at each end and carefully rock it back and
forth until the connectors pull free from the socket. Lift the card (1) straight up then away from the
inside of the chassis (2) to remove it. Be sure not to scrape the card against other components.
28 Chapter 4 Removal and replacement procedures