ASROCK 775i48 Datasheet download pdf (Page 16)

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 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 Setting Description

+5V

1_2

+5VSB

2_3

2-pin jumper

JR1 JL1

PS2_USB_PWR1 Short pin2, pin3 to enable

(see p.8 No. 1) +5VSB (standby) for PS/2

or USB wake up events.

Note: To select +5VSB, it requires 2 Amp and higher standby current provided by

power supply.

JR1(see p.8 No. 23)

JL1(see p.8 No. 23)

Note: If the jumpers JL1 and JR1 are short, both the front panel and the rear panel

audio connectors can work.

Clear CMOS

(CLRCMOS0, 2-pin jumper)

(see p.8 No. 12)

Note: CLRCMOS0 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 CLRCMOS0 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.

FSB 1066MHz

2_3

FSB 800MHz

1_2

FSB 533MHz

1_2

FSB1 “NORMAL” (short pin1, pin2)

(see p.8 item 26) is the default setting for the

FSB jumper. “1066” (short

pin2, pin3) is the setting for

the over clocking of CPU

frequency.

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 35 36

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ASROCK 775i48 Datasheet Page 16

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