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4. Connectors:
ITEM
CN1
CN2
CN3
CN4
CN5
CN6
CN7
CN8
CN9
IDE1,IDE2
FAN1,FAN2
5. Mini-ITX Power Supply
The Mini-ITX compliant power supply is designed with several space, energy and noise reduction
features in mind. The typical physical dimensions (see table below) are very compact compared to
other standard power supplies such as ATX. The options of AC 100 – 240V and 50 – 60Hz auto
switching are fully supported.
Power Supply
Length
iTX, Mini-ITX
174 mm
ATX
140 mm
The Mini-ITX power specification uses an industry standard 20-pin main connector to the power
supply as shown below.
1
11
2
12
3
13
4
14
5
6
7
17
8
18
9
19
10
20
VIA EPIA Mini-ITX Mainboard
FUNCTION
Audio Connector
COM Port Connector
USB Connector and RJ45 Connector
RCA Video or S/P DIF Jack
S-Video Jack
LPT Connector
CRT Connector
ATX Power Connector
PS/2 Keyboard Connector and mouse
Connector
On-board IDE Primary/Secondary
Connectors
FAN Connectors
Width
Height
73mm
55 mm
150 mm
86 mm
1
2
3
4
5
6
7
8
9
10
Note: NC = no connection
-8-
Operation Guidelines
Total
Area
smaller
150%
+3V
11
+3V
12
Gnd
13
+5V
14
Gnd
15
+5V
16
Gnd
17
PWR_GD
18
5V_SB
19
+12V
20
%
+3V
-12
Gnd
PWR_ON-
Gnd
Gnd
Gnd
NC
+5V
+5V
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