Processor Board Jumpers
Notes:
1. Turn off the server, and disconnect the power cord before
moving any jumpers.
2. Refer to Table 8 on page 330 for the correct clock speed and
PMC frequency selection jumper settings for the microprocessor.
For example, if you have a 200 MHz microprocessor installed
and the system bus speed is 66 MHz (the default), be sure that
the jumpers are set to a bus-to-core ratio 3 (200/66).
MHz denotes internal clock speed of the microprocessor only;
other factors also affect application performance.
Attention:
If the microprocessor bus-to-core ratio is incorrect,
system board components will overheat and component damage can
occur. Be sure that the microprocessor bus-to-core ratio jumper is
properly set.
Table 7 (Page 1 of 2). Defining Microprocessor Operating Parameters
Identifier
Default Jumper Position
Description
J1
J20
Clock speed jumper block.
The default setting is 66.66
MHz. Use the appropriate
microprocessor clock speed
for the microprocessor you
have installed.
J30
J29
J28
J27
Frequency selection jumper
block. The default
Core/Bus fraction is 3
(200/66 MHz).
J17
J18
Microprocessor memory
controller (PMC) frequency
selection jumper block.
The default is 66.66 MHz.
Appendix A. Jumpers
329
Summary of Contents for PC Server 330
Page 1: ...PC Server 330 User s Handbook IBM...
Page 6: ...vi PC Server 330 User s Handbook...
Page 10: ...x PC Server 330 User s Handbook...
Page 32: ...18 PC Server 330 User s Handbook...
Page 100: ...86 PC Server 330 User s Handbook...
Page 134: ...120 PC Server 330 User s Handbook...
Page 240: ...Updating the Server Configuration 226 PC Server 330 User s Handbook...
Page 326: ...Resolving Configuration Conflicts 312 PC Server 330 User s Handbook...
Page 382: ...IBM Part Number 76H8834 Printed in U S A September 1996 76H8834...