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User’s Manual 1-3
L550/L550D/L555/L555D
Features
This computer incorporates the following features and benefits:
Processor
Memory
Built-in The processor type varies depending on model.
To check which type of processor is included in
your model, open the TOSHIBA PC Diagnostic
Tool Utility by clicking Start -> All programs ->
TOSHIBA -> Utilities -> PC Diagnostic Tool.
Chipset Mobile Intel
®
GM45 Express Chipset
Mobile Intel
®
GL40 Express Chipset
Mobile Intel
®
HM55 Express Chipset
or
AMD M780G Chipset
AMD M780V Chipset
AMD M880G Chipset
AMD M860G Chipset
AMD M870 Chipset
Slots PC3-8500/PC2-6400 1 GB, 2 GB or 4 GB
memory modules can be installed in the two
memory slots.
Maximum system memory size and speed are
depending on the model you purchased.
For users of a 32-bit version of Windows: If your computer is configured
with two 2 GB memory modules or more, the memory might be displayed
as approximately 3 GB only (depending on the computer’s hardware
specifications).
This is correct because the operating system usually displays the available
memory instead of the physical memory (RAM) built into the computer.
Various system components (like the video adapter’s GPU and PCI
devices like Wireless LAN, etc.) require their own memory space. Since a
32-bit operating system cannot address more than 4 GB of memory these
system resources overlap the physical memory. It is a technical limitation
that the overlapped memory is not available to the operating system.
Even though some tools might display the actual physical memory built
into your computer, the memory available to the operating system will still
be approximately 3 GB only.
■ Maximum size of memory can be installed on Mobile Intel
®
GL40
Express Chipset models is 4GB.
■ PC2-6400 memory module works as PC2-5300 speed on AMD Athlon/
Sempron™ Processor.