MSI G31TM-P21 - Manual (Page 20)

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Hardware overclock FSB Switch: oC_SW (optional)
you can overclock the FSB to increase the processor frequency by changing this
switch. Follow the instructions below to set the FSB.
(default) 200 ->
266 MHz
200 ->
333 MHz
266 ->
333 MHz
200 ->
400 MHz
266 ->
400 MHz
333 ->
400 MHz
iMPoRtant
Make sure that you power off the system before changing the switch.
this overclocking behavior depends on the system’s configuration (memory ca-
pability, thermal solution...etc), and it is not guaranteed.
When overclocking cause instability or crash during boot, please set the switch
to default.
Clear CMoS Jumper: JBat
there is a CMoS RaM onboard that has a power supply from an external battery
to keep the data of system configuration. With the CMoS RaM, the system can
automatically boot oS every time it is turned on. if you want to clear the system
configuration, set the jumper to clear data.
1 1 1
JBat
keep data Clear data
iMPoRtant
you can clear CMoS by shorting 2-3 pin while the system is off. then return to
-2 pin position. avoid clearing the CMoS while the system is on; it will damage
the mainboard.
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