Chapter 2: Installation
2-13
CMOS Clear
JBT1 is used to clear CMOS. In-
stead of pins, this jumper consists of
contact pads to prevent accidentally
clearing the contents of CMOS.
To clear CMOS:
1) First power down the system and
unplug the power cord(s).
2) With the power disconnected, short
the CMOS pads with a metal object
such as a small screwdriver.
3) Remove the screwdriver (or shorting
device).
4) Reconnect the power cord(s) and
power on the system.
Note:
Do not use the PW_ON con-
nector to clear CMOS.
VGA Enable/Disable
JP4 allows you to enable or disable
the VGA port. The default position
is on pins 1 and 2 to enable VGA.
S e e t h e t a b l e o n t h e r i g h t f o r
jumper settings.
Jumper
Position
1-2
2-3
Definition
Enabled
Disabled
VGA Enable/Disable
Jumper Settings
(JP4)
Front Side Bus Speed
JP38 is used to set the system
(front side) bus speed for the pro-
cessors. It is best to keep this
jumper set to Auto. This jumper is
used together with the CPU Clock
setting in BIOS. See the table on
the right for jumper settings.
Jumper
Position
Pins 1-2
Pins 2-3
Definition
Auto
400 MHz
Front Side Bus Speed
Jumper Settings (JP38/39)
