Dell Alienware Area 51 R2 (Late 2014) - Manual (Page 63)

4 Grasp the memory module near the securing clip, and then gently ease the
memory module out of the memory-module slot.
NOTE: Repeat step 2 to step 3 to remove any other memory modules
installed in your computer.
1 securing clips (2) 2 memory module
3 memory-module slot
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