Asus Crosshair II Formula - Manual (Page 38)

2-12 Chapter 2: Hardware information
5. When the fan and heatsink assembly is in place, connect the CPU fan cable
to the connector on the motherboard labeled CPU_FAN.
• Do not forget to connect the CPU fan connector! Hardware monitoring
errors can occur if you fail to plug this connector.
• This connector is backward compatiable with old 3-pin CPU fan.
CROSSHAIR II FORMULA
®
RESET
CROSSHAIR II FORMULA CPU fan
CPU_FAN
CPU
FA
N PW
M
CPU
FA
N IN
CPU
FA
N PW
R
GND
CPU_FAN
CPU
FA
N PW
M
CPU
FA
N IN
CPU
FA
N PW
R
GND