Atx1: 24-pin atx power connector, Atx2: atx 12v power connector, Cpu_fan1: cpu fan power connector – IBASE MI900 User Manual
Page 18: Pwr_fan1: system fan power connectors
INSTALLATIONS
ATX1: 24-pin ATX Power Connector
Signal Name
Pin #
Pin #
Signal Name
3.3V 13
1 3.3V
-12V 14
2 3.3V
Ground 15
3 Ground
PS-ON 16
4 +5V
Ground 17
5 Ground
Ground 18
6 +5V
Ground 19
7 Ground
-5V 20
8
Power
good
+5V 21
9 5VSB
+5V 22
10 +12V
+5V 23
11 +12V
Ground 24
12 +3.3V
ATX2: ATX 12V Power Connector
This connector supplies the CPU operation voltage
Pin #
Signal Name
1 Ground
2 Ground
3 +12V
4 +12V
CPU_FAN1: CPU Fan Power Connector
Pin #
Signal Name
1 Control
2 Sense
3 +12V
4 Ground
PWR_FAN1: SYSTEM Fan Power Connectors
Pin #
Signal Name
1 Sense
2 +12V
3 Rotation
detection
14
MI900 User’s Manual
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