54
M
M
K
K
7
7
7
7
M
M
-
-
8
8
X
X
S
S
e
e
r
r
i
i
e
e
s
s
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
J
J
P
P
2
2
1
1
K
K
7
7
H
H
o
o
s
s
t
t
C
C
l
l
o
o
c
c
k
k
S
S
e
e
l
l
e
e
c
c
t
t
i
i
o
o
n
n
This jumper is used to specify the relationship of PCI and FSB clock. Generally speaking, if you are not an over-clocker, we
recommend you to set it to the default setting. Additionally, this motherboard also provides “1MHz Stepping CPU Adjustment”
feature for overclockers to adjust CPU FSB frequency via BIOS setup program. Based on the CPU type, the adjustment has two
levels, Auto and 133MHz, for your choosing. If you fix the CPU FSB frequency by JP21, the “1MHz Stepping CPU Adjustment”
range will be changed and follow the JP21 setting.
Pin 1
JP21 K7 Host Clock
Select Jumper
1
A
A
u
u
t
t
o
o
(
(
D
D
e
e
f
f
a
a
u
u
l
l
t
t
)
)
1
1
1
3
3
3
3
M
M
H
H
z
z
