Abit SG-71 User Manual page 41

Installing the Motherboard
(5). JP1 Header: CMOS Discharge Jumper Header
Before you clear the CMOS, you have to first turn the power off (including the +5V standby power).
Otherwise, your system may work abnormally.
After updating your BIOS and before boot up, please clear the CMOS first. Then put the jumper to its
default position. After that, you can reboot your system and ensure that your system is working fine.
(6). USB2 and USB3 Headers: Additional USB Plugs Headers
Note: Watch the pin position and the orientation
Jumper JP1 discharge CMOS memory. When you
install the motherboard, make sure this jumper is set
for normal operation (pin 1 and 2 shorted). See
figure below.
Note: Watch the pin position and the orientation
Note
These headers are for connecting the additional USB
port plugs. Each connector can provides two
additional USB plugs. Which means, total you can
get two additional USB plugs from each connector.
You can use the special USB port expansion cable
to connect it (the cable come with the metal plate
can fixed on the back panel of computer chassis).
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User's Manual