ASROCK P55 Extreme User Manual page 16

Step 3. Insert the 1156-Pin CPU:
Step 3-1. Hold the CPU by the edge where is
marked with black line.
Step 3-2. Orient the CPU with IHS (Integrated Heat
Sink) up. Locate Pin1 and the two ori-
entation key notches.
orientation key notch
Pin1
orientation key notch
1156-Pin CPU
For proper inserting, please ensure to match the two orientation key
notches of the CPU with the two alignment keys of the socket.
Step 3-3. Carefully place the CPU into the socket
by using a purely vertical motion.
Step 3-4. Verify that the CPU is within the socket
and properly mated to the orient keys.
Step 4. Close the socket:
Step 4-1. Rotate the load plate onto the IHS.
Step 4-2. While pressing down lightly on load
plate, engage the load lever.
Step 4-3. Secure load lever with load plate tab
under retention tab of load lever.
alignment key
alignment key
1156-Pin Socket
1 6 1 6 1 6
1 6 1 6
Pin1