Step 2. Install the Controller in the Computerwww.3ware.com 197 Press down gently on the edge of the 3ware RAID controllerdirectly above the PCI Express slot until it is fully seated.Figure 13. Inserting Controller Into PCI Express Slot8 Check that the 3ware RAID controller’s metal bracket coversthe hole in the case and secure the bracket with the screw thatwas used to secure the filler bracket in step 5.9 When you tighten the screw on the bracket to the enclosure,make sure the card is not slanted in any direction; otherwise thecard will not work properly.Use a PCI Express slotfor the 3ware 9650SEcontroller.If in doubt about whatslots you have, checkthe documentation foryour motherboard.Do NOTuse a PCI orPCI-X slot.