Asus P5GPL-X SE - Manual (Page 23)

ASUS P5GPL-X SE 1-23
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. Close the load plate (A), then
push the load lever (B) until it
snaps into the retention tab.
A
B