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Chapter 6  Installing Internal Options
5 When installing a low-profile card in PCI slot 2, attach the extension slot cover 
to the card with screw.
Use the screws attached to the extension slot cover. 
(Skip this step when installing a full-height expansion card.)
6 Insert the expansion card securely into the PCI slot.
When using PCI slot 1 or 2
When installing two cards in PCI slots 1 and 2, first install a card in PCI slot 1.
When using PCI slot 3
Install the SAS RAID Ctrl and then secure it with screws.
Extension
slot cover
Expansion card
(Low-profile)
Expansion card
PCI slot 2
PCI slot 1
PCI slot 3
SAS RAID Ctrl