HP ProBook 450 G3 Maintenance And Service Manual page 54

2. Remove the memory module (2) by pulling the module away from the slot at an angle.
NOTE:
module slot.
NOTE:
module and the bottom socket houses the primary memory module. The removal procedure is the same
for both memory sockets.
Reverse this procedure to install a memory module.
42 Chapter 5 Removal and replacement procedures for Customer Self-Repair parts
Memory modules are designed with a notch to prevent incorrect insertion into the memory
The computer uses two memory sockets. The top socket houses the expansion memory