38 User GuideInstalling an adapterYour computer system board has two peripheral component interconnect (PCI)expansion slots. Depending on your model, the expansion slots might alreadyhave adapters installed. You can install a low-profile PCI adapter in anyavailable PCI expansion slot. These adapters must not exceed 16.9 cm (6.66inches) in length and 5.15 cm (2.04 inches) in height.To install an adapter, do the following:1. Remove the rear cover. See “Removing the rear cover” on page 37.2. Rotate the card retainer down using the blue handle.3. Remove the slot cover for the expansion slot.4. Install the adapter 1 into the expansion slot on the system board.5. Rotate the card retainer up.6. Replace the rear cover.
