Dell Alienware Aurora R3 Manual page 40

To replace memory module(s):
Recommended memory configuration:
Type
1333 MHz, 1600 MHz, and 1866 MHz
38 CHAPTER 4: INSTALLING ADDITIONAL OR REPLACEMENT COMPONENTS
Slots
Slots 1 and 2 or slots 1 — 4
1. Follow the instructions in "Before You Begin" on page
2. Align the notch on the bottom of the memory module with the tab on the
memory module connector.
1
1 memory module connector
3 notch
CAUTION: To avoid damage to the memory module, press the memory
module straight down into the memory module connector while you
apply equal force to each end of the memory module.
34.
4
3
2
2 tab
4 memory module