IBM 847651U Handbook - Page 287

System Board Illustration The system board, also called the planar or motherboard, is the main circuit board in your server. It provides basic server functions and supports a variety of devices that are preinstalled or that you can install later. Some configuration actions are controlled through jumpers on the system board, whereas other actions are controlled through switches. The following sections discuss the jumper and switch settings that you can change. If you plan to install, remove, or replace hardware in your server, or if you must set jumpers and switches, you will need to know the layout of the system board. The following illustration shows the layout of the system board in your server. The numbered pointers show the components that are discussed in this book. 1 Battery 2 Configuration (rocker) switches 1-4 Microprocessor speed 5 ROM operation mode 6 Ethernet controller operation mode 7 Administrator password 8 Diskette write-protect 3 Microprocessor 4 DIMM Connector 0 5 DIMM Connector 1 6 DIMM Connector 2 7 Clear CMOS Request jumper 8 AGP slot connector for optional AGP adapter Notes: 1. An illustration of the system board and additional information are provided on a label inside the server. 2. The configuration switches (1-8) are also known as rocker switches. Their settings are specified later in this chapter. Chapter 7. Server records and specifications 253