Fan Connector, Cpu (12V, 4-Pin); Figure 4-6: +12V Fan Connector Location; Table 4-8: +12V Fan Connector Pinouts - IEI Technology IBM-Q354 User Manual

4.2.5 Fan Connector, CPU (12V, 4-pin)

CN Label: CPU_FAN1
CN Type: 4-pin header (1x4)
CN Location: See Figure 4-6
CN Pinouts: See Table 4-7
The CPU cooling fan connector provides a 12V, 500mA current to a CPU cooling fan. The
connector has a "rotation" pin to get rotation signals from fans and notify the system so the
system BIOS can recognize the fan speed. Please note that only specified fans can issue
the rotation signals.

Figure 4-6: +12V Fan Connector Location

PIN NO. DESCRIPTION
1 GND
2 +12VCC
3 Rotation Signal
4 Control
Table 4-7: +12V Fan Connector Pinouts
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IMB-Q354 uATX Motherboard