Asus RS520-E6/ERS8 - Manual (Page 30)

Chapter 2: Hardware setup 2-12
2.5 Expansion cards
The system motherboard comes with one PCI-E expansion slot installed with the
riser cage to support three expansion cards.
1. Locate the two screws on the riser
cage, then remove the screws from
the cage.
2. Firmly hold the riser cage, then
pull it up to detach it from the
PCI Express x16 slot on the
motherboard.
2.5.1 Installing an expansion card to the riser card bracket
To install an expansion card:
3. Place the riser cage on a flat and
stable surface, then unscrew the
metal cover opposite the PCI-E slot
that you want to use
4. Install the expansion card to the
riser card as shown
5. Secure the card with a screw.