MSI MS-7641 Manuel D'instructions page 21

uSB power Jumper: JuSB_PW, JuSB_PW2
these jumpers are used to select uSB ports powered by VCC5 or 5VSB. Set to
5VSB if you want the uSB ports provide power in standby mode.
JuSB_PW
(for rear uSB
2.0 ports)
JuSB_PW2
(for on-board
uSB connec-
tors)
imPoRtant
if you set the jumper to 5VSB, the power supply must be able to provide at least
2a currents.
20
1
keep uSB
power to VCC5
1
keep uSB
power to VCC5
1
keep uSB
power to 5VSB
1
keep uSB
power to 5VSB
1
1