Dell OptiPlex GXi Service Manual (.pdf) - Page 19

Chapter 1 System Overview The Dell® OptiPlex® GXi systems are high-speed, upgradable, desktop com- puters. The Dell OptiPlex GXi systems are available in three sizes: a low-profile desktop computer, a midsize desktop computer, and a mini tower computer. Chapters 1 through 3 and Appendix A contain information that applies to all models of the Dell OptiPlex GXi systems. Chapters 4, 5, and 6 are chassisspecific. The Dell OptiPlex GXi systems use the Intel® Pentium® family of microprocessors. These Dell computers incorporate the high-performance PCI expansion bus as well as the ISA expansion bus. These buses are built into the system board, which also integrates the microprocessor, memory controller, hard-disk drive controller, video controller, and other elements of the basic computer. The microprocessor for the OptiPlex GXi systems is installed in a ZIF socket, which allows the computer to be upgraded when faster microprocessors become available. The Pentium microprocessor contains a built-in clock multiplier circuit, which increases the internal operating frequency to a multiple of the system clock frequency. The microprocessors for each of these computers and their operating frequencies are as follows: • Dell OptiPlex GXi 133 systems - 133 MHz derived from a system clock frequency of 66 MHz • Dell OptiPlex GXi 166 systems - 166 MHz derived from a system clock frequency of 66 MHz • Dell OptiPlex GXi 166 systems with MMX™ technology - 166 MHz derived from a system clock frequency of 66 MHz • Dell OptiPlex GXi 200 systems - 200 MHz derived from a system clock frequency of 66 MHz • Dell OptiPlex GXi 200 systems with MMX technology - 200 MHz derived from a system clock frequency of 66 MHz • Dell OptiPlex GXi 233 systems with MMX technology - 233 MHz derived from a system clock frequency of 66 MHz System Overview 1-1