Dell Studio 1440 (Mid 2009) - Manual (Page 61)

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Specifications
Memory
Connectors
one user-accessible
SODIMM connector
Capacities 1 GB, 2 GB, and 4 GB
Type 1067 MHz SODIMM
DDR3
Minimum 1 GB (single channel)
Maximum 5 GB (dual channel)
NOTE: Memory specification of greater
than 4 GB is not well supported by 32-bit
operating systems.
Computer Information
System Chipset
Intel NVIDIA MCP79MX
Data bus width 64 bits
DRAM bus width dual channel (2)
64-bit buses
Processor address
bus width
32 bits
Flash EPROM 2 MB
ExpressCard
Controller
Intel MCP79MX
Cards supported ExpressCard/34 (34 mm)
1.5 V and 3.3 V
Connector size 26 pins