Installing System Components 1232 Open the system. See "Opening the System."3 Remove the expansion card stabilizer. See "Removing the Expansion CardStabilizer."4 Disconnect any cables connected to the expansion card.5 Remove the expansion card:a Open the expansion card latch adjacent to the slot. See Figure 3-19.b Grasp the expansion card by its top corners, and carefully pull the cardfrom the expansion-card connector.6 If you are removing the card permanently, install a filler bracket in theempty card slot.NOTE: Filler brackets must be installed over empty expansion card slots tomaintain Federal Communications Commission (FCC) certification of thesystem. The brackets also keep dust and dirt out of the system and aid inproper cooling and airflow inside the system.7 Install the expansion card stabilizer. See "Installing the Expansion CardStabilizer."8 Close the system. See "Closing the System."9 Place the system upright and on its feet on a flat, stable surface.10 Reattach any peripherals, then connect the system to the electrical outlet.11 Turn on the system and attached peripherals.12 Remove the card’s device driver from the operating system.System MemoryYour system supports DDR3 registered memory modules (RDIMMs) or ECCunbuffered memory modules (UDIMMs). Single and dual-rank memorymodules can be 1067- or 1333-MHz, and quad-rank memory modules can be1067-MHz.The system contains 12 memory sockets split into two sets of six sockets, oneset per each processor. Each six-socket set is organized into three channels oftwo memory sockets per channel. The first socket of each channel is markedwith white release levers.The maximum memory that is supported on your system varies according tothe types and sizes of memory modules being used:
