Asus Z8PH-D12/IFB - Manual (Page 30)

2-12 Chapter 2: Hardware information
The CPU fits in only one correct
orientation. DO NOT force the
CPU into the socket to prevent
bending the connectors on the
socket and damaging the CPU!
6. Position the CPU over the socket,
ensuring that the gold triangle is on
the bottom-left corner of the socket,
and then fit the socket alignment key
into the CPU notch.
7. Apply some Thermal Interface
Material to the exposed area of
the CPU that the heatsink will be
in contact with, ensuring that it is
spread in an even thin layer.
Some heatsinks come with
pre-applied Thermal Interface
Material. If so, skip this step.
Gold
triangle
mark
Alignment key
CPU notch
The Thermal Interface Material is toxic. DO NOT eat the Thermal Interface
Material. If it gets into your eyes or touches your skin, ensure that you wash it
off immediately and seek professional medical help.
To prevent contaminating the Thermal Interface Material, DO NOT spread the
Thermal Interface Material with your finger directly.