HP P Class 450/500/550/600/650/700/750 Supplementary Manual page 16

Oxygen GVX1
Installing an Oxygen GVX1 Card
7. Remove the bulkhead filler panel from the AGP slot.
Your Personal Workstation may look different than the one documented here.
NOTE
8. Grasp the graphics card's bulkhead and opposite edges, and align the card's contact
fingers with the AGP and AGP Pro connector on the system board. Ensure that the
card's contact fingers are fully seated in their connectors.
16
AGP or AGP Pro Connector
Chapter 1