Intel GA-8I865GVMK-775 - Manual (Page 39)

BIOS Setup - 39 -
English
2-6 PC Health Status
Current CPU/System Temperature
Detect CPU/System temperature automatically.
Current Voltage(V) Vcore / +3.3V / +5V / +12V / DDR25V
Detect system's voltage status automatically.
Current CPU/SYSTEM FAN Speed (RPM)
Detect CPU/SYSTEM Fan speed status automatically.
CPU Smart FAN Control
Disabled Disable this function.
Enabled When this function is enabled, CPU fan will run at different speed depending on
CPU temperature. Users can adjust the fan speed with Easy Tune based on
their requirements. (Default value)
CPU Smart FAN Mode
This option is available only when CPU Smart FAN Control is enabled.
Auto BIOS autodetects the type of CPU fan you installed and sets the optimal CPU Smart
FAN control mode for it. (Default value)
Voltage Set to Voltage when you use a CPU fan with a 3-pin fan power cable.
PWM Set to PWM when you use a CPU fan with a 4-pin fan power cable.
CMOS Setup Utility-Copyright (C) 1984-2005 Award Software
PC Health Status
Current CPU Temperature 50 o C
Current System Temperature 32 o C
Vcore 1.35V
+3.3V 3.28V
+5V 5.17V
+12V 11.84V
DDR25V 2.39V
Current CPU FAN Speed 3308 RPM
Current SYSTEM FAN Speed 0 RPM
CPU Smart FAN Control [Enabled]
CPU Smart FAN Mode [Auto]
KLJI: Move Enter: Select +/-/PU/PD: Value F10: Save ESC: Exit F1: General Help
F5: Previous Values F6: Fail-Safe Defaults F7: Optimized Defaults
Item Help
Menu Level`
In fact, the Voltage option can be used for CPU fans with 3-pin or 4-pin power cables.
However, some 4-pin CPU fan power cables are not designed following Intel 4-wire fans
PWM control specifications. With such CPU fans, selecting PWM will not effectively reduce
the fan speed.