Asus Motherboard P7P55D - Manual (Page 26)

2-6 Chapter 2: Hardware information
Chapter 2
3. Lift the load lever in the direction of the
arrow until the load plate is completely
lifted.
Load plate
4. Remove the PnP cap from the CPU
socket.
PnP cap
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!
5. 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 keys into the CPU
notches.
Gold
triangle
mark
Alignment keys
CPU notches