26
A
A
X
X
4
4
P
P
E
E
/
/
A
A
X
X
4
4
P
P
E
E
-
-
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
”
”
AOpen provides a special and useful feature on this motherboard 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 according to user’s settings 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
a higher system performance without removing the system housing and save the hassle from setting the jumper to clear CMOS data when
system hangs.
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
