Dell Studio 1557 (Late 2009) - Manual (Page 86)

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Specifications
ExpressCard
ExpressCard
controller
Intel ICH9M (Studio 1555)
Mobile Intel 5 series
express chipset PM55
(Studio 1557)
Mobile Intel 5 series
express chipset HM55
(Studio 1558)
Cards supported ExpressCard/34 (34 mm)
1.5 V and 3.3 V
Connector size 26 pins
Memory
Connectors two user‑accessible
SODIMM connectors
Capacities 1 GB, 2 GB, and 4 GB
Memory type 800 MHz SODIMM DDR2
(Studio 1555)
1067/1333 MHz SODIMM
DDR3 (Studio 1557/Studio
1558)
Minimum memory 1 GB (single channel)
Maximum memory 8 GB
(dual channel ‑ 4 GB x 2)
NOTE: For instructions on upgrading
the memory, see the Service Manual at
support.dell.com/manuals.