Figure 3-8: Cooling Fan Connector Locations; Table 3-7: Cooling Fan Connector Pinouts - IBM 3301690 User Manual

The CPU_FAN1 CPU cooling fan connector provides a 12V, 500mA current to the 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.
PIN
DESCRIPTION
1 Ground
2 +12V
3 Rotation Signal

Table 3-7: Cooling Fan Connector Pinouts

Figure 3-8: Cooling Fan Connector Locations

3301690 CPU Card
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