Dell OptiPlex GX280 - Manual (Page 354)

1 fully seated card
2 not fully seated card
3 bracket within slot
4 bracket caught outside of slot
9. If applicable, before replacing the card retention mechanism, ensure that:
The tops of all cards and filler brackets are flush with the alignment bar.
The notch in the top of the card or filler bracket fits around the alignment guide.
10. Snap the card retention mechanism into place, securing the card(s) in the computer.
1 card retention latch