Asus AP1720-E2 - Manual (Page 48)

Chapter 2: Hardware setup 2-28
3. When the card is inside the
chassis, push down the end of
the card until it is level with the
PCI slot.
2.8.2 Installing a long expansion card
If you wish to install a long expansion card, such as some types of RAID
cards, you need to remove the lower hot swap drive cage (for AS8 models
or separately purchased second hot-swap HDD cage) and install an
internal (non-hot swap) drive cage with long card guides that keep the
expansion cards firmly seated on the slots.
1. The internal drive cage is optional and separately purchased. See
section “Chapter 3: Installation options” for instructions on installing
the drive cage.
2. The AS4, AA4, and AI4 models support long expansion cards.
To install a long expansion card:
1. Remove the plastic card lock opposite the slot where you wish to install
the expansion card. Release the card lock by pressing the center tabs
and pushing outward. Set the card lock aside for later use.
2. Tilt the long card as shown while
aligning the metal bracket with
the slot opening on the rear
panel.
4. Push the card connector into the
PCI slot until it is securely seated.
5. When the card is in place, secure
it with the plastic card lock that
you removed earlier.