Memory: Dell OptiPlex 320 User's Guide
file:///N|/For_lekha/For%20Deepa/Nadia/UG/A00/en/nadia-temp-working-jul19/Nadia_UG_A00/Output/memory.htm[5/22/2015 10:43:53 AM]
Systems Only)
This computer supports a maximum of 4 GB of memory when you use two 2-GB DIMMs. Current 32-bit operating systems,
such as Microsoft® Windows® XP, can use a maximum of 4 GB of address space; however, the amount of memory available
to the operating system is less than that installed. 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.
NOTE:
If you use a 64-bit operating system, the entire memory range is available to the operating system.
The following components require memory address space:
System ROM
APICs
Integrated PCI devices, such as network connectors
PCI cards
Graphics cards
PCI Express cards (if applicable)
At start-up, the BIOS identifies the components that require address space. The BIOS dynamically calculates the amount of
reserved address space required. The BIOS then subtracts the reserved address space from 4 GB to determine the amount of
usable space.
If the total installed computer memory is less than the usable space, all installed computer memory is only available for
use by the operating system.
If the total installed computer memory is equal to or greater than the usable address space, a portion of installed
memory is not available for use by the operating system.
Removing Memory
CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions in the
Product Information Guide
.
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.
NOTE:
Memory purchased from Dell is covered under your computer warranty.
2. Carefully press out the securing clip at each end of the memory module connector.
1 memory module
