Gigabyte GA-P55-US3L (REV. 2.1) [29/112] F_usb1 f_usb2 usb headers

- 29 - Hardware Installation

16) F_USB1/F_USB2 (USB Headers)

 TheheadersconformtoUSB2.0/1.1specication.EachUSBheadercanprovidetwoUSBportsviaan

optional USB bracket. For purchasing the optional USB bracket, please contact the local dealer.

PinNo. Denition

1 Power (5V)

2 Power (5V)

3 USB DX-

4 USB DY-

5 USB DX+

6 USB DY+

7 GND

8 GND

9 No Pin

10 NC

• Do not plug the IEEE 1394 bracket (2x5-pin) cable into the USB header.

• Prior to installing the USB bracket, be sure to turn off your computer and unplug the power

cord from the power outlet to prevent damage to the USB bracket.

17) CLR_CMOS (Clearing CMOS Jumper)

 Usethis jumperto clearthe CMOSvalues (e.g.date informationand BIOScongurations) andreset

the CMOS values to factory defaults. To clear the CMOS values, place a jumper cap on the two pins to

temporarily short the two pins or use a metal object like a screwdriver to touch the two pins for a few

seconds.

Open: Normal

Short: Clear CMOS Values

• Always turn off your computer and unplug the power cord from the power outlet before clear-

ing the CMOS values.

• After clearing the CMOS values and before turning on your computer, be sure to remove the

jumper cap from the jumper. Failure to do so may cause damage to the motherboard.

• After system restart, go to BIOS Setup to load factory defaults (select Load Optimized De-

faults)ormanuallyconguretheBIOSsettings(refertoChapter2,"BIOSSetup," for BIOS

congurations).