Asus P5B - Manual (Page 37)

ASUS P5B Premium Series 2-9
Fastener
Motherboard hole
2.3.2 Installing the CPU heatsink and fan
The Intel ® LGA775 processor requires a specially designed heatsink and fan
assembly to ensure optimum thermal condition and performance.
To install the CPU heatsink and fan:
1. Place the heatsink on top of the
installed CPU, making sure that the
four fasteners match the holes on
the motherboard.
• When you buy a boxed Intel ® processor, the package
includes the CPU fan and heatsink assembly. If you buy a CPU separately,
make sure that you use only Intel ® -certified multi-directional heatsink and
fan.
• Your Intel ® LGA775 heatsink and fan assembly comes in a push-pin design
and requires no tool to install.
• If you purchased a separate CPU heatsink and fan assembly, make sure
that you have properly applied Thermal Interface Material to the CPU
heatsink or CPU before you install the heatsink and fan assembly.
Make sure that you have installed the motherboard to the chassis before you
install the CPU fan and heatsink assembly.
Make sure to orient each fastener with the narrow end of the groove pointing
outward. (The photo shows the groove shaded for emphasis.)
Orient the heatsink and fan
assembly such that the CPU fan
cable is closest to the CPU fan
connector.
Narrow end
of the groove