MSI H61M-P20 G3 Serie Mode D'emploi page 22

Clear CMoS Jumper: JBAt
there is a CMoS rAM on board with an external battery power supply to preserve
the system configuration data. With the CMoS rAM, the system can automatically
boot oS every time it is turned on. if you want to clear the system configuration,
please temporarily short these two pins to clear data by using a metal object.
iMPortANt
you can clear CMoS by touching two pins once with a metal object while the
system is off. Avoid clearing the CMoS while the system is on; it will damage the
mainboard.
uSB power Jumper: JuSB_PW
this jumper allows you to enable/ disable the "Wakeup from S3/S4/S5 by uSB
and PS/2 device" function.
JuSB_PW
iMPortANt
if you set the jumper to enabled, the power supply must be able to provide +5VSB
and at least 2A currents.
PCi express Slot
the PCie slot supports the PCie interface expansion card.
22
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1
keep data

disabled
1
Clear data

enabled
the PCie x6 slot
the PCie x slot