2 gb memory upgrade Dell Optiplex 369

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El - Nov 10, 2009 at 07:59 PM
xpcman Posts 19530 Registration date Wednesday October 8, 2008 Status Contributor Last seen June 15, 2019 - Nov 11, 2009 at 12:26 AM
Hello,

I just installed 2 sticks of Corsair DDR2 (2x2gb) for a total of 4gb of RAM. When I check My Computer>Properties, computer only indicates 3gb of RAM. What gives? Do I have to change BIOS?

Thanks.

E
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xpcman Posts 19530 Registration date Wednesday October 8, 2008 Status Contributor Last seen June 15, 2019 1,825
Nov 11, 2009 at 12:26 AM
32bit Windows XP will never show the full 4 GB due to internal addressing limits. Your video memory space is mapped into the 4 GB address space as is memory on the BIOS. If you have a 1 GB video card that 1 GB is subtracted from the total memory giving you less than 3 GB.
The following components require memory address space:

* System ROM
* APIC(s)
* Integrated PCI devices, such as network connectors and SCSI controllers
* PCI cards
* Graphics card
* PCI Express cards (if applicable)

Very few people report more that 3.24 GB with Windows XP.

Do you need to update the BIOS? Probably not
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