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Chapter 2: Installation
2-19
SMB
A System Management Bus
header is located at J22. Connect
the appropriate cable here to uti-
lize SMB on your system.
Fan Header Pin Definitions
(J22)
Pin
Number
1
2
3
4
Definition
Data
GND
CLK
NC
Caution: These fan headers
are DC power.
SMB Power (I
2
C)
Connector
I
2
C Connector (J24), located be-
tween the PWR ForceOn Header
and the PWR Fault header, moni-
tors the status of PWR Supply,
Fan and system temperature.
SMB PWR
Pin Definitions (J24)
Pin #
1
2
3
4
5
Definition
Clock
Data
N/A
N/A
N/A
GLAN1
®
JLAN1
S
UPER X6DH8-G2
GLAN2
DIMM 2B (Bank 2)
DIMM 2A (Bank 2)
DIMM 3B (Bank 3)
DIMM 3A (Bank 3)
DIMM 4B (Bank 4)
DIMM 4A (Bank 4)
DIMM 1A (Bank 1)
DIMM 1B (Bank 1)
F
a
n
1
8-pin
PWR
PWR
SMBus
JF1
FP Control
JD1
S
P
K
PW LED
JP15
Fan2JOH1
O
H
F
a
n
8
Fan3
C
H
In
tru
J
L
1
W
D
E
n
a
b
le
IP
M
I
IDE1
Floppy
C
O
M
2
J
2
0
B
IO
S
J
W
D
J
P
A
1
SCSI CH A
U
ltr
a
3
2
0
SCSI CH B
Fan4
J
P
A
2
7
9
0
2
C
T
R
L
S
A
T
A
0
S
A
T
A
1
U
S
B
2
/3
S
M
B
U
S
S
p
e
a
k
e
r
P
C
I-X
#
1
1
0
0
M
H
z
Z
C
R
P
C
I-X
#
2
1
0
0
M
H
z
P
C
I-X
#
3
1
3
3
M
H
z
W
O
R
B
a
tte
ry
J
P
L
1
G
L
A
N
C
T
L
R
R
A
G
E
-
X
U
S
B
4
8
2
5
4
6
G
L
A
N
E
n
a
b
le
X
4
P
C
I-E
p
x
#
4
X
8
P
C
I-E
p
x
#
5
X
8
P
C
I-E
p
x
#
6
J12
J13
J14
J15
J16
J17
S
u
p
e
r
I/O
N
o
rth
B
rid
g
e
J
P
G
1
V
G
A
C
O
M
1
U
S
B
0
/1
K
B
/
M
o
u
s
e
F
a
n
6
F
a
n
5
A
T
X
P
W
R
4
-P
in
P
W
R
JPF
Parrallel
Port
J
1
1
J
3
2
2
4
-P
in
Force PWR ON
V
G
A
E
n
a
b
le
F
a
n
7
J24
J1D1
J1B4
R
e
b
o
o
t
O
p
t. E
n
a
b
le
JP14
J3
J4
JP
8
J
7
SCSI
J
P
A
3
J
D
2
J
2
2
C
P
U
1
C
P
U
2
Alrm
Reset
J
W
O
R
SCSI
Enable
SCSI CHA Term. Ena
C
lr
C
M
O
S
J
B
T
1
IC
H
5
R
S
I/O
P
X
H
J
9
J
5
J
6
J
2
3
W
O
L
J
W
O
L
J
S
1
J
S
2
U
ltra
3
2
0
J
A
2
J
A
1
IDE2
JP12
PW
Fault
JP13
3rd PS
Alarm
SCSI CHB Term. Ena
PWR SMB
SMB