HP Elite 8300 Series Convertible Minitower Maintenance And Service Manual page 145

b. If you are removing a standard PCI card or PCI Express x1 card, hold the card at each end,
and carefully rock it back and forth until the connectors pull free from the socket. Pull the
expansion card straight up from the socket then away from the inside of the chassis to
release it from the chassis frame. Be sure not to scrape the card against the other
components.
Figure 7-9 Removing a Standard PCI Expansion Card
Expansion Cards 133