HP ProLiant DL580 G3 Server - Manual (Page 81)

Expansion board options 81
The PCI Express x8 mezzanine option adds support for one optional PCI Express
x8 non-hot-plug expansion slot in slot 1.
Installing the PCI-X Hot Plug Mezzanine Option
1.
Power down the server ("Powering down the server" on page
37 ).
2.
Extend or remove the server from the rack ("Extending the server from the
rack" on page 38 ).
3.
Remove the access panel ("Removing the access panel" on page
40 ).