DEC Digital PC 3500 System Reference Manual page 117

Adding Expansion Boards
5. Insert the AGP card into the AGP socket.
6. Push the AGP card firmly into place.
7. For short tower computers only, secure the AGP card to the slot with the
screw removed in step 4. For low profile computers, do not use the screw.
The top cover for the low profile computer's chassis securely holds the AGP
card in place.
8. Replace the outside cover.
9. Connect all external devices and restore power.
NOTE
onboard video hardware. The BIOS will automatically disable the
onboard video and enable the AGP card.
5-12
: No BIOS Setup changes are necessary for disabling