Dell Dimension 8400 Owner's Manual - Page 73

Addressing Memory With 4-GB Configurations, Installing Memory - upgrades

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matched pair of memory modules in DIMM connectors 1 and 2 (white securing clips) matched pair of memory modules in DIMM connectors 3 and 4 (black securing clips) 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 DIMM connectors 1 and 2 or DIMM connectors 3 and 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 located 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 chassis. 1 Follow the procedures in "Before You Begin" on page 59. 2 Lay the computer on its side so that the system board is on the bottom of the inside of the computer. 3 Press out the securing clip at each end of the memory module connector. Removing and Installing Parts 73

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Removing and Installing Parts
73
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 DIMM
connectors 1 and 2 or DIMM connectors 3 and 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
located 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 chassis.
1
Follow the procedures in "Before You Begin" on page59.
2
Lay the computer on its side so that the system board is on the bottom of the inside of the
computer.
3
Press out the securing clip at each end of the memory module connector.
matched pair of memory modules in
DIMM connectors 1 and 2 (white
securing clips)
matched pair of memory modules
in DIMM connectors 3 and 4
(black securing clips)