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A
X
3
S
M
a
x
/
A
X
3
A
X
3
S
M
a
x
/
A
X
3
S
u
p
p
o
r
t
8
U
S
B
S
u
p
p
o
r
t
8
U
S
B
This motherboard provides 8
are two connectors on the PC99 back panel. You can use proper cable to connect other USB connectors to the back panel or
front panel of chassis. By the way, you can use JP34 to disable USB3 and USB4 if you do not need them.
Pin 1
1
Enable
Disable
(Default)
USB3 & 4
S
P
l
u
s
I
I
-
U
S
P
l
u
s
I
I
-
U
C
o
n
n
e
c
t
o
r
s
C
o
n
n
e
c
t
o
r
s
USB
connectors to connect USB devices, such as mouse, keyboard, modem, printer, etc. There
USB2 Connector
55
O
n
l
i
n
e
M
a
n
u
a
l
O
n
l
i
n
e
M
a
n
u
a
l
1
2
+5V
+5V
SBD3-
SBD2-
SBD3+
SBD2+
GND
GND
NC
KEY
Pin 1
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