Alienware M11x MOBILE User Manual page 98

CHAPTER 7: SPECIFICATIONS
Memory
Connectors
Capacities
Memory type
Memory configurations
possible
IEEE 1394 A
IEEE 1394 A controller
IEEE 1394 interface
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two internally-accessible DDR3 SODIMM sockets
1 GB, 2 GB, and 4 GB
1066 MHz and 1333 MHz (operates at 800 Mhz)
dual-channel DDR3 configurations
NOTE: Chipset allows memory to run only at 800 Mhz.
2 GB, 3 GB, 4 GB, and 8 GB
JMicron JMB380
compliant with standard IEEE 1394a-2000 specification