IBM 847681U Hardware Maintenance Manual - Page 161
Microprocessor speed switches settings
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Microprocessor speed switches settings: When you replace a microprocessor with one that has a different speed8, you might have to change the switch settings on the system board. Before you begin: Read "Safety information" on page 212 Power-off the server and all other connected devices. Disconnect all external cables attached to the server; then, remove the server cover. Locate the Flash Utility Diskette that you created in "Remote administration" on page 34. Note If you have not already done so, go to http://www.ibm.com/support/ on the World Wide Web and download the appropriate flash update program. Review the applicable README files, and use this information to create a Flash Utility Diskette. Perform the POST/BIOS (flash) update procedure (see "Remote administration" on page 34 for additional information). 1. Locate the configuration switches (also known as rocker switches) on the system board. For more information, refer to the label inside the server, or see "System board illustration" on page 142. 2. To set the appropriate microprocessor speed, set switches 1 to 4 as shown in the following illustration. It might be helpful to use the end of a small screwdriver to set the switch. Note Switches 5 to 8 are not used for microprocessor speed settings. Attention The following illustration is for reference only. Before you change the settings for switches 1 through 4, be sure that you check the orientation of the server system board to correctly identify the switch number locations. If you change the settings for the wrong switches, you might seriously damage server components or options. 8 MHz denotes internal clock speed of the microprocessor only; other factors also affect application performance. IBM Netfinity 3000 - Type 8476 153
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