Dell Alienware M17x R3 (Early 2011) - Manual (Page 46)

CHAPTER 3: USING YOUR LAPTOP
44
Using Removable Media and Cards
Observe the safety measures below:
CAUTION: Inserting a blank card upside down may damage your laptop.
When no Media Card is inserted into the Media Card slot, ensure that the blank card that
shipped with your laptop is inserted in the unused slot. The blank card protects the unused
slot from dust and other particles. When inserting a blank card, ensure that the correct side
is on the top (indicated by an arrow mark on some blank cards). For information on the media
cards supported, see “Specifications” on page 103.