Asus P5GD2 Deluxe - Manual (Page 35)

A S U S P 5 G D 2 D e l u x e A S U S P 5 G D 2 D e l u x e A S U S P 5 G D 2 D e l u x e A S U S P 5 G D 2 D e l u x e A S U S P 5 G D 2 D e l u x e 2 - 1 1 2 - 1 1 2 - 1 1 2 - 1 1 2 - 1 1
2. Push each of the pins downward
to secure the heatsink and fan
assembly in place.
3. Rotate the push-pins clockwise
to lock.