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850 Revision B Motherboard Jumpers

Common CPU Settings
Each CPU may have unknown variations in jumper settings.
For some "common" settings, choose the manufacturer type below. JP1, JP2, JP3 - Bus Ratio (CPU Multiplier)
Multiplier BF0
JP1		 BJ2
JP2		 BJ1
JP3
X1.5/X3.5 OFF OFF OFF
X2.0 ON OFF OFF
X2.5 ON OFF ON
X3.0 OFF OFF ON
X4.0 ON ON OFF
X4.5 ON ON ON
X5.0 OFF ON ON

JP4 - VGA Select
JP4
External VGA 1 - 2
On-Board VGA 2 - 3

JP5, JP6 - CPU I/O Voltage
JP5 JP6
3.5 V
Intel P54C, AMD K5, Cyrix 6x86, IDT WinChip		 1 - 2 1 - 2
3.3 V
Intel P55C (MMX), AMD K6/ K6-2, Cyrix 6x86L/ 6x86MX/ MII		 2 - 3 2 - 3

JP8, JP9, JP10, JP11 - CPU Core Voltage
JP8 JP9 JP10 JP11
1.8V Open Open Open Open
2.2V Open Open Closed Open
2.8V Open Open Open Closed
2.9V Closed Open Open Closed
3.2V Open Open Closed Closed
3.3V Closed Open Closed Closed
3.5V Closed Closed Closed Closed

JP14, JP15, JP16 - CPU Clock (Bus Speed)
Clock (MHz) JP14 JP15 JP16
50 ON ON ON
60 OFF ON ON
66.6 ON OFF ON
75 OFF ON OFF

JP17 - Linear Mode Selection
JP17
Enabled
(Cyrix Only)		 Closed
Disabled
(Non-Cyrix Only)		 Open

JP18 - PCI/ CPU Bus Synchronization
JP18
Asynchronous
(CPU Bus Speed at 75 MHz)		 1 - 2
Synchronous
(CPU Bus Speed 66.6 MHz or less)		 2 - 3

JP19 - Clear CMOS
JP19
Default (Normal) 1 - 2
Clear CMOS 2 - 3