Asus P5BV/SAS - Manual (Page 41)

ASUS P5BV Series 2-21
4. Fan mode setting (3-pin CPUFAN_SET1 and CHAFAN_SET1)
These jumpers allow you to connect either a 3-pin or a 4-pin fan cable plug
to the CPU fan or Chasis fan connectors Set these jumpers to pins 1-2 Short
PWM mode if you are using a 4-pin fan cable plug, or to pins 2-3 Short DC
mode if you are using a 3-pin plug.
®
P5BV
P5BV Fan Mode Setting
1
2
CPUFAN_SET1
(Default)
PWM Mode DC Mode
2
3
CHAFAN_SET1
1 2
(Default)
PWM Mode DC Mode
2 3