Dell Alienware M11x R2 (Mid 2010) - Manual (Page 94)

CHAPTER 7: SPECIFICATIONS
94
Memory
Connectors
two internally-accessible DDR3 SODIMM sockets
Capacities 1 GB, 2 GB, and 4 GB
Memory type 1066 MHz and 1333 MHz (operates at 800 Mhz)
dual-channel DDR3 configurations
Memory configurations
possible 2 GB, 3 GB, 4 GB, and 8 GB
IEEE 1394 A
IEEE 1394 A controller JMicron JMB380
IEEE 1394 interface compliant with standard IEEE 1394a-2000 specification