HP Pro 3330 Microtower Maintenance & Service Manual page 74

c. If you are removing a PCI Express x16 card, pull the retention arm on the back of the
expansion socket away from the card and carefully rock the card back and forth until the
connectors pull free from the socket. Be sure not to scrape the card against the other
components.
Figure 7-16
6. Store the removed card in anti-static packaging.
7. If you are not installing a new expansion card, install an expansion slot cover to close the open
slot.
CAUTION:
expansion slot cover for proper cooling of internal components during operation.
8. To install an expansion card, locate where the card will be seated inside the computer.
Figure 7-17
64 Chapter 7 Removal and Replacement Procedures – Microtower (MT) Chassis
Removing a PCI Express x16 expansion card
After removing an expansion card, you must replace it with a new card or
Expansion slot locations (HP Pro 3330/3380 shown)