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Service Hints & Tips

Document ID: MCGN-3R4R7K

PC Server 325 - Microprocessor Board connectors and jumpers

Applicable to: World-Wide

Microprocessor Board Connectors and Jumpers

Jumper Settings - Pentium II

Note Refer to "Bus/CPU Speed MHz Settings - Pentium II" for the correct clock speed and frequency selection jumper settings for the microprocessor.

Jumper	Description
J20, J38	Clock speed jumper block. The default setting is 66.66 MHz. Use the appropriate microprocessor clock speed for the microprocessor that you have installed.
J27, J28, J29, J30	Processor core frequency selection jumper block. The default core/bus fraction is 3.5 (233 MHz). (Note: MHz measures only processor internal clock speed, not application performance. Many factors affect application performance.) (Jumpers are installed on J27 and J30; no jumper is installed on J28 or J29.) For the core/bus fraction 4 (266 MHz), the jumpers are installed on J27, J28, and J29; no jumper is installed on J30. For the core.bus fraction 4.5 (300 MHz), the jumpers are installed on J27 and J29; no jumper is installed on J28 or J30. For the core.bus fraction 5 (333 MHz), the jumpers are installed on J27 and J28; no jumper is installed on J29 or J30.
J17, J18	Microprocessor memory controller (PMC) frequency selection jumper block. The default setting is 66.66 MHz.
J9, J10, J12	Reserved.
J8	Reserved.

Bus/CPU Speed MHz Settings - Pentium II

	Search Keywords
	Hint Category	Hardware Maintenance Information, Processors
	Date Created	26-01-98
	Last Updated	22-01-99
	Revision Date	11-08-99
	Brand	IBM PC Server
	Product Family	PC Server 325
	Machine Type	8639
	Model	PB0; PT0; PTW; RB0; AAB; 1RY; 2RY; CM0; ZB0; ZBW; ZM0; ZMW; ZS0; ZSW; ZT0; ZTW; ZBR
	TypeModel
	Retain Tip (if applicable)
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