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850 Common Jumpers - Cyrix

6x86
CPU Speed (MHz) Bus Speed (MHz)
& Multiplier
Multiplier I/O Voltage* Core Voltage Bus Speed Linear Mode PCI/ CPU Bus Synchronization
PR-120+
100 MHz
50 x 2 JP1
JP2
JP3
On
Off
Off
JP5
JP6
1-2
1-2
JP8
JP9
JP10
JP11
Closed
Closed
Closed
Closed
JP14
JP15
JP16
On
On
On
JP17 Closed JP18 2-3
PR-150+
120 MHz
60 x 2 JP1
JP2
JP3
On
Off
Off
JP5
JP6
1-2
1-2
JP8
JP9
JP10
JP11
Closed
Closed
Closed
Closed
JP14
JP15
JP16
Off
On
On
JP17 Closed JP18 2-3
PR-166+
133 MHz
66 x 2 JP1
JP2
JP3
On
Off
Off
JP5
JP6
1-2
1-2
JP8
JP9
JP10
JP11
Closed
Closed
Closed
Closed
JP14
JP15
JP16
On
Off
On
JP17 Closed JP18 2-3
PR-200+
150 MHz
75 x 2 JP1
JP2
JP3
On
Off
Off
JP5
JP6
1-2
1-2
JP8
JP9
JP10
JP11
Closed
Closed
Closed
Closed
JP14
JP15
JP16
Off
On
Off
JP17 Closed JP18 1-2
* The "I/O Voltage" jumpers (JP5 & JP6) are only on revision B motherboard. Not on revision D.

Note: Some versions of the 6x86 have a Core and I/O voltage of 3.3V instead of the 3.5V listed above. Ensure which voltage is needed (it should be listed on the CPU itself), and change the voltage if necessary. (refer to the previous "jumpers" page)

6x86L
CPU Speed (MHz) Bus Speed (MHz)
& Multiplier
Multiplier I/O Voltage* Core Voltage Bus Speed Linear Mode PCI/ CPU Bus Synchronization
PR-120+
100 MHz
50 x 2 JP1
JP2
JP3
On
Off
Off
JP5
JP6
2-3
2-3
JP8
JP9
JP10
JP11
Open
Open
Open
Closed
JP14
JP15
JP16
On
On
On
JP17 Closed JP18 2-3
PR-150+
120 MHz
60 x 2 JP1
JP2
JP3
On
Off
Off
JP5
JP6
2-3
2-3
JP8
JP9
JP10
JP11
Open
Open
Open
Closed
JP14
JP15
JP16
Off
On
On
JP17 Closed JP18 2-3
PR-166+
133 MHz
66 x 2 JP1
JP2
JP3
On
Off
Off
JP5
JP6
2-3
2-3
JP8
JP9
JP10
JP11
Open
Open
Open
Closed
JP14
JP15
JP16
On
Off
On
JP17 Closed JP18 2-3
PR-200+
150 MHz
75 x 2 JP1
JP2
JP3
On
Off
Off
JP5
JP6
2-3
2-3
JP8
JP9
JP10
JP11
Open
Open
Open
Closed
JP14
JP15
JP16
Off
On
Off
JP17 Closed JP18 1-2
* The "I/O Voltage" jumpers (JP5 & JP6) are only on revision B motherboard. Not on revision D.

6x86MX
CPU Speed (MHz) Bus Speed (MHz)
& Multiplier
Multiplier I/O Voltage* Core Voltage Bus Speed Linear Mode PCI/ CPU Bus Synchronization
PR-166
133 MHz
66 x 2 JP1
JP2
JP3
On
Off
Off
JP5
JP6
2-3
2-3
JP8
JP9
JP10
JP11
Closed
Open
Open
Closed
JP14
JP15
JP16
On
Off
On
JP17 Closed JP18 2-3
PR-166
150 MHz
60 x 2.5 JP1
JP2
JP3
On
Off
On
JP5
JP6
2-3
2-3
JP8
JP9
JP10
JP11
Closed
Open
Open
Closed
JP14
JP15
JP16
Off
On
On
JP17 Closed JP18 2-3
PR-200
150 MHz
75 x 2 JP1
JP2
JP3
On
Off
Off
JP5
JP6
2-3
2-3
JP8
JP9
JP10
JP11
Closed
Open
Open
Closed
JP14
JP15
JP16
Off
On
Off
JP17 Closed JP18 1-2
PR-200
166 MHz
66 x 2.5 JP1
JP2
JP3
On
Off
On
JP5
JP6
2-32-3 JP8
JP9
JP10
JP11
Closed
Open
Open
Closed
JP14
JP15
JP16
On
Off
On
JP17 Closed JP18 2-3
PR-233
188 MHz
75 x 2.5 JP1
JP2
JP3
On
Off
On
JP5
JP6
2-3
2-3
JP8
JP9
JP10
JP11
Closed
Open
Open
Closed
JP14
JP15
JP16
Off
On
Off
JP17 Closed JP18 1-2
* The "I/O Voltage" jumpers (JP5 & JP6) are only on revision B motherboard. Not on revision D.

MII
CPU Speed (MHz) Bus Speed (MHz)
& Multiplier
Multiplier I/O Voltage* Core Voltage Bus Speed Linear Mode PCI/ CPU Bus Synchronization
266
200 MHz
66 x 3 JP1
JP2
JP3
Off
Off
On
JP5
JP6
2-3
2-3
JP8
JP9
JP10
JP11
Closed
Open
Open
Closed
JP14
JP15
JP16
On
Off
On
JP17 Closed JP18 2-3
300
225 MHz
75 x 3 JP1
JP2
JP3
Off
Off
On
JP5
JP6
2-3
2-3
JP8
JP9
JP10
JP11
Closed
Open
Open
Closed
JP14
JP15
JP16
Off
On
Off
JP17 Closed JP18 1-2
300
233 MHz
66 x 3.5 JP1
JP2
JP3
Off
Off
Off
JP5
JP6
2-3
2-3
JP8
JP9
JP10
JP11
Closed
Open
Open
Closed
JP14
JP15
JP16
On
Off
On
JP17 Closed JP18 2-3
333
263 MHz
75 x 3.5 JP1
JP2
JP3
Off
Off
Off
JP5
JP6
2-3
2-3
JP8
JP9
JP10
JP11
Closed
Open
Open
Closed
JP14
JP15
JP16
Off
On
Off
JP17 Closed JP18 1-2
* The "I/O Voltage" jumpers (JP5 & JP6) are only on revision B motherboard. Not on revision D.