Asus KFN5-Q/SAS - Manual (Page 51)

2-30 Chapter 2: Hardware information
The following tables show the corresponding switch for each fan connector.
• If you use a 4-pin fan but set the DIP switch for a 3-pin fan,
the fan you installed may not work.
• If you use a 3-pin fan but set the DIP switch for a 4-pin fan, the fan
controll will not work and the fan you installed will always run at full
speed.
DIP_SW1:
DIP_SW2:
Switch Fan connector Default Setting
1 CPU_FAN1 ON (4-pin fan)
2 CPU_FAN2 ON (4-pin fan)
3 CPU_FAN3 ON (4-pin fan)
4 CPU_FAN4 ON (4-pin fan)
Switch Fan connector Default Setting
1 FRNT_FAN1 ON (4-pin fan)
2 FRNT_FAN2 ON (4-pin fan)
3 FRNT_FAN3 ON (4-pin fan)
4 FRNT_FAN4 ON (4-pin fan)
5 FRNT_FAN5 ON (4-pin fan)
6 FRNT_FAN6 ON (4-pin fan)
7 REAR_FAN1 ON (4-pin fan)
8 REAR_FAN2 ON (4-pin fan)