Memory modules – Dell XPS 400/Dimension 9150 User Manual
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Removing and Installing Parts: Dell XPS 400 Service Manual
file:///T|/htdocs/systems/xps400/sm/parts.htm[8/3/2012 3:11:45 PM]
memory, the modules function at the slowest speed installed.
Be sure to install a single memory module in the DIMM_1 connector, the connector closest to the processor, before you
install modules in the other connectors.
NOTE:
Memory purchased from Dell is covered under your computer warranty.
NOTICE:
If you remove your original memory modules from the computer during a memory upgrade, keep them
separate from any new modules that you may have, even if you purchased the new modules from Dell. If possible, do
not pair an original memory module with a new memory module. Otherwise, your computer may not start properly.
You should install your original memory modules in pairs either in connectors DIMM_1 and DIMM_2 or connectors
DIMM_3 and DIMM_4.
Addressing Memory With 4-GB Configurations
Your computer supports a maximum of 4 GB of memory when you use four 1-GB DIMMs. Current operating systems, such as
Microsoft® Windows® XP, can only use a maximum of 4 GB of address space; however, the amount of memory available to
the operating system is less than 4 GB. Certain components within the computer require address space in the 4-GB range.
Any address space reserved for these components cannot be used by computer memory.
Installing Memory
CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions in the
Product Information Guide.
NOTICE:
To prevent static damage to components inside your computer, discharge static electricity from your body
before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface
on the computer.
1. Follow the procedures in "
2. Remove the
3. Lay the computer on its side so that the system board is on the bottom of the inside of the computer.
4. Press out the securing clip at each end of the memory module connector.