Apple Power Macintosh 9500 Series - Manual (Page 140)

Expansion card power requirements
The combined power consumption of expansion cards must not exceed the
limits specified for your Macintosh model. If you have more than one
expansion card installed, check the information that came with your cards to
make sure that their power consumption is within the limits specified in the
Technical Information booklet.
Installing an expansion card
IMPORTANT Some cards may need to be installed by an Apple-authorized
service provider. Check the information that came with the card.
1 Turn off the computer.
Leave the computer plugged in to ground it.
2 Loosen the six large screws at the corners and sides of the back panel.
Do not completely remove the screws or the back panel.
130 Appendix B