Asus NCT-D - Manual (Page 35)

A S U S N C T - D A S U S N C T - D A S U S N C T - D A S U S N C T - D A S U S N C T - D 2 - 1 3 2 - 1 3 2 - 1 3 2 - 1 3 2 - 1 3
Do not forget to connect the
CPU fan connector! Hardware
monitoring errors may occur if
you fail to plug this connector.
2. Use a Phillips screwdriver to
tighten the four heatsink screws
in a diagonal sequence.
3. Connect the fan cable to the
4-pin connector labeled
CPU_FAN1.
4. Repeat steps 1 to 3 to install
the other heatsink if you have
installed a second CPU, then
connect the fan cable to the
4-pin connector labeled
CPU_FAN2.
The heatsinks appear as shown
when installed.