Asus AP1720-E1 - Manual (Page 33)

ASUS PC-DL Deluxe motherboard 2-7
2. Place the heatsink retention
mechanism over the CPU socket,
matching its holes with the four
holes on the motherboard and the
standoffs on the thermal plate.
3. Secure the retention mechanism
with the thermal plate using four
screws.
4. Position the heatsink on top of the
CPU, having its angled side (with
cut corners) facing the memory
sockets. Make sure that the
heatsink base fits completely on
the retention mechanism.
Heatsink angled side
Heatsink retention mechanism