Back to Contents Page
Memory
Dell™ OptiPlex™ GX520 User's Guide
DDR2 Memory Overview
Addressing Memory With 4-GB Configurations
Removing Memory
Replacing/Adding Additional Memory
For information on the type of memory supported by your computer, see the "Memory" section of the specifications for your computer:
l
Mini Tower Computer Specifications
l
Desktop Computer Specifications
l
Small Form Factor Computer Specifications
DDR2 Memory Overview
Dual-channel DDR2 memory modules should be installed in
pairs of matched memory size
. If the DDR2 memory modules are not installed with the same amount
of memory in each channel, the computer will continue to operate, but with a slight reduction in performance. See the label in the upper-right corner of the
module to determine the module's capacity.
The recommended memory configurations are:
l
A pair of matched memory modules installed in connectors DIMM1 and DIMM2
or
l
A memory module installed in connector DIMM1
Be sure to install a single memory module in DIMM1, the connector closer to the processor, before you install a module in the other connector.
Addressing Memory With 4-GB Configurations
This computer supports a maximum of 4 GB of memory when you use two 2-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.
The following components require memory address space:
l
System ROM
l
APIC(s)
l
Integrated PCI devices, such as network connectors and SCSI controllers
l
PCI cards
l
Graphics card
l
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.
l
If the total installed computer memory is less than the usable space, all installed computer memory is available for use only by the operating system.
l
If the total installed computer memory is equal to or greater than the usable address space, a small portion of installed memory is available for use by
the operating system.
NOTICE:
Before you install new memory modules, download the most recent BIOS for your computer from the Dell Support website at
support.dell.com
.
NOTE:
Always install DDR2 memory modules in the order indicated on the system board.
NOTICE:
Do not install ECC memory modules. Doing so may cause the system not to boot or affect performance.
Содержание OptiPlex GX520
Страница 1: ...Dell OptiPlex GX520 User s Guide Mini Tower Computer Desktop Computer Small Form Factor Computer ...
Страница 22: ...4 Press Alt b to restart the computer and implement your changes Back to Contents Page ...
Страница 29: ......
Страница 97: ...Back to Contents Page ...
Страница 108: ......
Страница 145: ......
Страница 149: ...10 Replace the computer cover Back to Contents Page 3 captive screw housing 2 ...
Страница 157: ...Back to Contents Page ...
Страница 166: ...Back to Contents Page ...
Страница 181: ...10 Replace the computer cover Back to Contents Page 3 captive screw in housing 2 ...
Страница 222: ...Back to Contents Page Dell OptiPlex GX520 User s Guide Back to Contents Page ...