Dell Alienware M11x (Early 2010) - Manual (Page 64)

CHAPTER 4: INSTALLING AND REPLACING COMPONENTS
64
5
4
3
2
1
1 memory module 4 notch
2 spring locks (2) 5 memory module connector
3 tab
To replace the memory modules, perform the removal steps in reverse order. While inserting
the memory module into the connector align the notch on the memory module with the tab
on the memory module connector.