Chapter 3 Jumpers & Headers Setup; Checking Jumper Settings; Cmos Memory Clearing Header; Keyboard Power Function(Jkb) - XFX GeForce 8300 (MI-A78U-8309) User Manual

XFX Motherboard Series
Chapter 3 Jumpers & Headers Setup

3.1 Checking Jumper Settings

• For a 2-pin jumper, plug the jumper cap on both
pins will make it CLOSE (SHORT). Remove the
jumper cap, or plug it on either pin (reserved for
future use) will leave it at OPEN position.
• For 3-pin jumper, pin 1~2 or pin 2~3 can be
shorted by plugging the jumper cap in.
How to identify the PIN1 jumpers?
Please check the motherboard carefully, the PIN1
is marked by "1" or white thick line.

3.2 CMOS Memory Clearing Header

The time to clear the CMOS memory occurs when (a)
the CMOS data becomes corrupted, (b) you forgot
the supervisor or user password preset in the BIOS
menu, (c) you are unable to boot-up the system
because the CPU ratio/clock was incorrectly set in the
BIOS menu, or (d) whenever there is modifi cation on
the CPU or memory modules.
This header uses a jumper cap to clear the CMOS
memory and have it reconfi gured to the default
values stored in BIOS.
• Pins 1 and 2 shorted
(Default): Normal
operation.
• Pins 2 and 3 shorted:
Clear CMOS memory.
• The button of CMOS_BT1
on back panel, if press this
button on any environment,
the function is same with
Pins 2 and 3 be shorted.
• When the boot is from standard BIOS,the LEDA1 LED on board will light on;
if the boot is from Overclock BIOS, the LEDB1 LED on board will light on.
To clear the CMOS memory and load in the default values:
1. Power off the system.
2. Set pin 2 and pin 3 shorted by the jumper cap. Wait for a few seconds. Set the jumper
cap back to its default settings --- pin 1 and pin 2 shorted.
3. Power on the system.
4. For incorrect CPU ratio/clock settings in the BIOS, press <Del> key to enter the BIOS
setup menu right after powering on system.
5. Set the CPU operating speed back to its default or an appropriate value.
6. Save and exit the BIOS setup menu.

3.3 Keyboard Power Function(JKB)

Pin 1-2 short: Disabled power on by keyboard
Pin 2-3 short: Support power on by keyboard
JBIOSSLC
NC Dual_BIOS
1-2 Standard BIOS
2-3 Overclock BIOS
- 11 -
JKB:
User Guide