Jumpers Setup - ASROCK 748-M User Manual

2.7 Jumpers Setup

The illustration shows how jumpers are
setup. When the jumper cap is placed on
pins, the jumper is "SHORT". If no jumper cap
is placed on the pins, the jumper is "OPEN".
The illustration shows a 3-pin jumper whose
pin1 and pin2 are "SHORT" when jumper cap
is placed on these 2 pins.
Jumper
FSB_SEL0,
FSB_SEL1
FSB_SEL0
(see p.7 item 9)
FSB_SEL1
Note: The setting of the CPU front side bus frequency of this motherboard is by means of the
adjustment of jumper-setting. You must set the FSB jumper according to your AMD CPU
before you use the "Manual" option as the FSB setting in BIOS setup to perform over
clocking. Please follow the figures above to set the CPU front side bus frequency.
PS2_USB_PW1
(see p.7 item 1)
Note: To select +5VSB, it requires 2 Amp and higher standby current provided by power
supply.
JR1
(see p.7 item 21)
JL1
(see p.7 item 22)
Note: If the jumpers JL1 and JR1 are short (see the figure above), both front panel and rear
panel audio connectors can work.
Clear CMOS
(CLRCMOS2, 2-pin jumper)
(see p.7 item 11)
Note: CLRCMOS2 allows you to clear the data in CMOS. The data in CMOS includes system
setup information such as system password, date, time, and system setup parameters. To
clear and reset the system parameters to default setup, please turn off the computer and
unplug the power cord, then use a jumper cap to short the pins on CLRCMOS2 for 3
seconds. Please remember to remove the jumper cap after clearing the CMOS. If you need
to clear the CMOS when you just finish updating the BIOS, you must boot up the system
first, and then shut it down before you do the clear-CMOS action.
Setting
2_3
FSB_SEL0
1_2
FSB_SEL1
FSB 200MHz
FSB 266MHz
1_2
+5V
JR1
2-pin jumper
2_3
FSB_SEL0
2_3
FSB_SEL1
FSB 333MHz
2_3
+5VSB
JL1
1_2
FSB_SEL0
1_2
FSB_SEL1
FSB 400MHz
Short pin2, pin3 to enable
+5VSB (standby) for PS/2 or
USB wake up events.
1_2
2_3
1 3