Dell OptiPlex GXi Service Manual (.pdf) - Page 25

AC power receptacle security cable slot power supply internal drive bays parallel port connector serial port connector hard-disk drive bracket keyboard connector mouse connector USB connectors NIC connector video connector microphone jack line-out jack line-in jack padlock ring interface cable expansion-card cage system board riser board Figure 1-5. Internal View of the Mini Tower Computer Advanced Expansion Subsystem The Dell OptiPlex GXi systems offer advanced expansion subsystems that can support a mixture of traditional ISA expansion cards (called legacy cards), Plug and Play ISA expansion cards, and PCI expansion cards. The ISA Configuration Utility (ICU) included with the computer provides a means of avoiding resource conflicts that might arise from such an arrangement. After all legacy cards have been configured with the ICU, the computer automatically assigns any required memory space, IRQ lines, and DMA channels to any installed Plug and Play ISA expansion cards and PCI expansion cards the next time the computer is rebooted. Chapter 3, "Using the ISA Configuration Utility," in the Reference and Installation Guide describes the ICU and provides instructions for using it to configure the computer. Low-Profile Computer's Expansion-Card Slots The low-profile computers have three expansion-card slots. The riser board has two ISA expansion-card connectors and two PCI expansion-card connectors. One PCI expansion-card connector and one ISA expansion-card connector share a single expansion-card slot, resulting in a total of three expansion-card slots (see Figure 1-6). The low-profile computers have a passive riser board, with no PCI-to-PCI bridge. System Overview 1-7