WARNING: This information is provided "as is" with no warranty. Use at your own risk!
This site is NOT affiliated with PB.

850 Common Jumpers - Intel CPU

CPU Speed (MHz) Bus Speed (MHz)
& Multiplier		 Multiplier I/O Voltage* Core Voltage Bus Speed Linear Mode PCI/ CPU Bus Synchronization
75 50 x 1.5 JP1
JP2
JP3		 Off
Off
Off		 JP5
JP6		 1-2
1-2		 JP8
JP9
JP10
JP11		 Closed
Closed
Closed
Closed		 JP14
JP15
JP16		 On
On
On		 JP17 Open JP18 2-3
90 60 x 1.5 JP1
JP2
JP3		 Off
Off
Off		 JP5
JP6		 1-2
1-2		 JP8
JP9
JP10
JP11		 Closed
Closed
Closed
Closed		 JP14
JP15
JP16		 Off
On
On		 JP17 Open JP18 2-3
100 66 x 1.5 JP1
JP2
JP3		 Off
Off
Off		 JP5
JP6		 1-2
1-2		 JP8
JP9
JP10
JP11		 Closed
Closed
Closed
Closed		 JP14
JP15
JP16		 On
Off
On		 JP17 Open JP18 2-3
120 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 Open JP18 2-3
133 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 Open JP18 2-3
150 60 x 2.5 JP1
JP2
JP3		 On
Off
On		 JP5
JP6		 1-2
1-2		 JP8
JP9
JP10
JP11		 Closed
Closed
Closed
Closed		 JP14
JP15
JP16		 Off
On
On		 JP17 Open JP18 2-3
166 66 x 2.5 JP1
JP2
JP3		 On
Off
On		 JP5
JP6		 1-2
1-2		 JP8
JP9
JP10
JP11		 Closed
Closed
Closed
Closed		 JP14
JP15
JP16		 On
Off
On		 JP17 Open JP18 2-3
166 MMX 66 x 2.5 JP1
JP2
JP3		 On
Off
On		 JP5
JP6		 2-3
2-3		 JP8
JP9
JP10
JP11		 Open
Open
Open
Closed		 JP14
JP15
JP16		 On
Off
On		 JP17 Open JP18 2-3
200 66 x 3 JP1
JP2
JP3		 Off
Off
On		 JP5
JP6		 1-2
1-2		 JP8
JP9
JP10
JP11		 Closed
Closed
Closed
Closed		 JP14
JP15
JP16		 On
Off
On		 JP17 Open JP18 2-3
200 MMX 66 x 3 JP1
JP2
JP3		 Off
Off
On		 JP5
JP6		 2-3
2-3		 JP8
JP9
JP10
JP11		 Open
Open
Open
Closed		 JP14
JP15
JP16		 On
Off
On		 JP17 Open JP18 2-3
233 MMX 66 x 3.5 JP1
JP2
JP3		 Off
Off
Off		 JP5
JP6		 2-3
2-3		 JP8
JP9
JP10
JP11		 Open
Open
Open
Closed		 JP14
JP15
JP16		 On
Off
On		 JP17 Open JP18 2-3
* The "I/O Voltage" jumpers (JP5 & JP6) are only on revision B motherboard. Not on revision D.