HP Evo D510 SFF Hardware Reference Manual page 22

Hardware Upgrades
2–10
6. Open both latches of the memory module socket 1, and insert the
memory module into the socket 2.
Installing a DIMM
7. Begin by installing a module into the socket nearest the
preinstalled module, and install the modules following the
numerical order of the sockets.
8. A memory module can be installed in only one way. Match the
notch on the module with the tab on the memory socket. Push
the module down into the socket and push the latches inward,
ensuring that the module is fully inserted and properly seated 3.
9. Repeat steps 6 through 8 for any additional modules that you
want to install.
10. Replace the computer cover.
11. If you normally lock the Smart Cover Lock, use Computer Setup
to relock the lock and enable the Smart Cover Sensor.
The computer should automatically recognize the additional memory
the next time you power on the computer.
Hardware Reference Guide