FAN Power Connectors: SYSF1 and SYSF2
These connectors support cooling fans of up to 350mA (4.2 Watts). Connect the fan’s plug to the
board taking into consideration the polarity of connector.
PIN ASSIGNMENT
1 GND
2 12V
3 Tachometer
Installing Power Cables
The Q35SB is powered through 3 connectors: the PICMG1.0 edge connector, the backplane EATX1
and ATX12V1. The edge connector provides most of the system voltages, like +12V, -12V, 5V and
3.3V. ATX12V1 provides 12V to power the processor.
CPU Power: ATX12V1
PIN ASSIGNMENT PIN ASSIGNMENT
3 +12V 4 +12V
1 GND 2 GND
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