Tyan Computer Tyan S1598 Setting Jumpers, CPU Bus Speed Settings, CPU Core Voltage Settings

Chapter 2

Board Installation

1. Setting Jumpers

1-A. CPU Bus Speed Settings

Bus Speed	JP4	JP5	JP6
60MHz	2-3	2-3	2-3
66MHz	1-2	2-3	2-3
75MHz	1-2	1-2	2-3
83MHz	1-2	2-3	1-2
95MHz	2-3	1-2	1-2
100MHz	1-2	1-2	1-2

1-C. CPU Core Voltage Settings

CPU Voltage	JP8	JP9	JP10	JP11	JP12
1.3V	OFF	OFF	OFF	OFF	ON
1.4V	OFF	ON	OFF	OFF	ON
1.5V	OFF	OFF	ON	OFF	ON
1.6V	OFF	ON	ON	OFF	ON
1.7V	OFF	OFF	OFF	ON	ON
1.8V	OFF	ON	OFF	ON	ON
1.9V	OFF	OFF	ON	ON	ON
2.0V	OFF	ON	ON	ON	ON
2.1V	ON	OFF	OFF	OFF	OFF
2.2V**	OFF	ON	OFF	OFF	OFF
2.3V	ON	ON	OFF	OFF	OFF
2.4V	OFF	OFF	ON	OFF	OFF

** Default Setting (2.2V)

1-B. CPU Clock Multiplier

Multiplier	JP1	JP2		JP3
2.5x	ON	ON		OFF
3x	OFF	ON		OFF
3.5x	OFF	OFF		OFF
4x	ON	OFF		ON
4.5x	ON	ON		ON
5x	OFF	ON		ON
5.5x	OFF	OFF		ON
CPU Voltage	JP8	JP9	JP10		JP11	JP12
2.5V	ON	OFF		ON	OFF	OFF
2.6V	OFF	ON		ON	OFF	OFF
2.7V	ON	ON		ON	OFF	OFF
2.8V	OFF	OFF	OFF		ON	OFF
2.9V	ON	OFF	OFF		ON	OFF
3.0V	OFF	ON	OFF		ON	OFF
3.1V	ON	ON	OFF		ON	OFF
3.2V	OFF	OFF		ON	ON	OFF
3.3V	ON	OFF		ON	ON	OFF
3.4V	OFF	ON		ON	ON	OFF
3.5V	ON	ON		ON	ON	OFF

The CPU speed is controlled by setting the bus speed and the multiplier with the jumpers described above that are appropriate for your CPU and memory. You must have a 100MHz processor AND PC/100 memory to run at a bus speed of 100MHz. Tyan does not recommend operating CPUs, memory or PCI

!bus at higher than rated speed. Tyan takes no responsibility for any problems related to overclocking any bus or component on the system board.

important!

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