NEC Express5800 series User Manual page 174

If an option operating with only 33 MHz is installed in one of the slots (1C, 2C, and 3C,
or 1B, 2B, and 3B) on a PCI riser card, the options installed in the other slots of the
same riser card are subjected to operation with only 33 MHz.
Installing a PCI Board
Perform the following steps to install a PCI board on the riser card:
IMPORTANT:
Each riser card supports low-profile or full-height PCI boards.
Before installing a PCI board, confirm that the type of the PCI
board.
When installing a PCI board, confirm that the card connector
matches the connector of the riser card.
1. See the section "Preparing for Installation and Removal" described earlier to prepare.
2. Pull out the server from the rack.
Remove the top cover.
3.
Lift straight up and remove the riser card from the server.
4.
Unlock and open the retainer clip.
5.
6. Remove the extension slot cover.
Keep the removed extension slot cover for future use.
NOTE:
164 Upgrading Your NEC Storage
Low-profile type
Retainer clip
Low-profile type
Plastic loop
Full-height type
Retainer clip
Full-height type