Dell Alienware M17x R2 (Early 2010) - Manual (Page 26)

CHAPTER 7: MEMORY MODULE(S)
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You can increase your computer memory by installing memory modules on the
system board. See the “Basic Specifications” section in your Mobile Manual or in
the Comprehensive Specifications at support.dell.com/manuals for information
on the memory supported by your computer. Install only memory modules that
are supported by your computer.
NOTE: Memory modules purchased from Dell or Alienware are covered
under your computer warranty.
Your computer has two user-accessible SODIMM sockets that can be accessed
from the bottom of the computer.
CHAPTER 7: MEMORY MODULE(S)
CHAPTER 7: MEMORY MODULE(S)