26
A
A
X
X
4
4
L
L
R
R
/
/
A
A
X
X
4
4
L
L
R
R
-
-
N
N
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
A
A
O
O
p
p
e
e
n
n
“
“
W
W
a
a
t
t
c
c
h
h
D
D
o
o
g
g
T
T
i
i
m
m
e
e
r
r
”
”
With this motherboard, AOpen provides a very special, useful feature for overclockers. When you power-on the system, the BIOS
will check last system
POST
status. If it succeeded, the BIOS will enable “Watch Dog Timer” function immediately, and set the CPU
FSB
frequency by user’s setting that stored in the BIOS. If system failed in BIOS POST, the “Watch Dog Timer” will reset the
system to reboot in five seconds. Then, BIOS will detect the CPU’s default frequency and POST again. With this special feature,
you can easily overclock your system to get higher system performance, and without removing the cover of system housing to set
the jumper to clear CMOS data when your system hanged.
BIOS
Clock Generator
CPU
AOpen
Watch Dog
Timer
CPU ID Signal
Enable/Disable Signal
from BIOS
Reset Signal
Countdown about
5 seconds if fails
in POST
