MSI MS-6380 - Manual (Page 41)

Hardware Setup
2-25
Keyboard Wake-up Jumper: JKBV1
The JKBV1 jumper is used to set PS/2 keyboard/mouse and Rear USB
wake-up function. To use the function, you should also go to BIOS to enable
the PS/2 keyboard/mouse & USB wake-up (power on) function.
JKBV1
1
VCC 5V --
Disable Keyboard
Power On Function
5V StandBy (Default)--
Enable Keyboard
Power On Function
3
1
3
1
Note: To be able to use this function, you need a power
supply that provides enough power for this feature. (Power
supply with 750mA 5V Stand-by)