Dell XPS 17 (L701X, Late 2010) - Manual (Page 20)

20 Memory Module(s)
4 Replace the module cover (see "Replacing the Module Cover" on page 16).
5 Replace the battery (see "Replacing the Battery" on page 14).
6 Connect the AC adapter to your computer and an electrical outlet.
CAUTION: Before turning on the computer, replace all screws and ensure that no
stray screws remain inside the computer. Failure to do so may result in damage to
the computer.
7 Turn on the computer.
As the computer boots, it detects the additional memory and automatically
updates the system configuration information.
To confirm the amount of memory installed in the computer:
Click Start
→ Control Panel→ System and Security→ System.
1 tab 2 notch
3 memory-module connector