VIA Technologies P4XB-S User Manual page 18

Chapter 2
3. Mount the fan on top of the heatsink. Press down the fan firmly until its four clips
become wedged in the holes of the retention mechanism.
4. Press the two levers down to secure the fan. Each lever can be pressed down in only
ONE direction.
5. Connect the fan power cable from the mounted fan to the 3-pin fan power connector
on the mainboard.
levers
2-10
fan power cable