ECS P5SD-B Plus, Manual, Page: 11 / 36

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Set the System Bus Speed, AGP and PCI clocks: JP6 to JP12
Jumpers JP6, JP7, JP8, JP9, JP10, JP11, and JP12 are used to set the mainboard timing
for the system bus, the AGP clock, and the PCI clock. The table below shows the
settings that are available.
Speed Settings MHz Short Pin Settings
CPU
CLK AGP
CLK
PCI
CLK
JP6 JP7 JP8 JP9 JP10 JP11 JP12
112 74 37 1-2 2-3 2-3 1-2 2-3 1-2 2-3
100 66 33 1-2 1-2 2-3 1-2 2-3 1-2 2-3
95/90 63 31 2-3 1-2 2-3 1-2 2-3 1-2 2-3
83 55 27 2-3 2-3 1-2 1-2 2-3 1-2 2-3
75 75 37 1-2 2-3 1-2 1-2 2-3 2-3 1-2
68 68 34 2-3 2-3 2-3 1-2 2-3 2-3 1-2
66 66 33 1-2 1-2 1-2 1-2 2-3 2-3 1-2
Shaded row indicates the default values.
Set the Memory Bus Speed: JP9 and JP10
As a default, the memory bus uses the same clock speed as the CPU clock. If you are
using slower memory that does not comply with the PC-100 standard, you can use JP9
and JP10 to make the memory bus the same speed as the AGP clock. The setting of
JP9 and JP10 must be the same (Run CPU clock or Run AGP clock), otherwise the
system will be fail.
JP9 Function Jumper Cap
DRAM run CPU CLK Short Pins 1-2
DRAM run AGP CLK Short pins 2-3
JP10Function Jumper Cap
DRAM run CPU CLK Short pins 2-3
DRAM run AGP CLK Short Pins 1-2
Set CPU Core Voltage: JPW1
This mainboard supports a variety of CPUs with various core voltages. Use JPW1 to
set the core voltage that is required by your CPU.
Core Voltage Pins 1-2 Pins 3-4 Pins 5-6 Pins 7-8
3.5V Short Short Short Short
3.4V Short Short Short Open
3.3V Short Short Open Short
3.2V Short Short Open Open
3.1V Short Open Short Short
3.0V Short Open Short Open
2.9V Short Open Open Short
JP10
Default
3
2
1
JP9
Default
3
2
1
1-2
3-4
5-6
7-8
JPW1
Default
2.8V