Tyan Computer TYAN S1471 user manual CPU Speed Settings for Cyrix/SGS/IBM 6x86/M1 J15 J40 J39

3.2 Jumper Settings

CPU Speed Settings for Pentium P54C and P55C:

J15	J40	J39	CPU Speed
1-2, 3-4	Off	Off	75 MHz
3-4	Off	Off	90 MHz
1-2	Off	Off	100 MHz
3-4	On	Off	120 MHz
1-2	On	Off	133 MHz
3-4	On	On	150 MHz
1-2	On	On	166 MHz
1-2	Off	On	200 MHz

CPU Speed Settings for Cyrix/SGS/IBM 6x86/M1:

J15	J40	J39	CPU Speed	CPU ID
1-2, 3-4	On	Off	100MHz	P120+
3-4	On	Off	120MHz	P150+
1-2	On	Off	133MHz	P166+

CPU Voltage Regulator Settings:

Pentium MMX requires two voltage sources, J20, J21, & J22 are settings for one source. J23, J24 and J35 are settings for the second voltage source. The default setting is for P54C/MMX CPU's.

	P54C& MMX	Cyrix
J203.5V	on	off
J213.3V	off	on
J223.6V	off	off
J23	off	on
J24	on	off
J35	on	off

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