System Installation
ROBO-8911VG2A User’s Manual
3-2
J25: +12V Power input Connector
PIN No.
Signal Description
PIN No.
Signal Description
1 GND
2 GND
3 +12V
4 +12V
Note:
You should know Pentium M processor need extra 12V Power source. DON’T
FORGET TO CONNECT 4pin 12V connector to J25!
Removing CPU
1) Unlock the cooling fan first.
2) Lift the lever of CPU socket outwards and upwards to the other end.
3) Carefully lifts up the existing CPU to remove it from the socket.
4) Follow the steps of installing a CPU to change to another one or place handling bar
to close the opened socket.
Configuring System Bus
ROBO-8911VG2A will automatically detect the CPU used. CPU speed of Intel
Pentium M can be detected automatically.
JP2B : CPU VCCA voltage input
JP2B
Function
2-4 short
VCCA=1.8V (Banias)
4-6 short
VCCA=1.5V (Dothan)
Ì
Note:
Wrong voltage selection may damage the CPU. Please survey the CPU’s type
before setup this jumper setting.
JP4: CPU FSB frequency selection
JP4
Function
1-2 short
CPU FSB frequency=400MHz
Ì
2-3 short
CPU FSB frequency=533MHz
Notes:
1) The DDR2 frequency is followed the CPU FSB frequency. For example, the DDR2
module populated is DDR2 533; the CPU must be 533MHz FSB. Please use same
frequency of memory module and CPU.
2) Neither CPU/DDR=533/400 nor 400/533 are allowed. This is the limitation of
915GM chipset.
