DDR2 SDRAM 533 mhz 1GBx2 not being recognized

[Shango46]

I have a brand new computer that I just upgraded the memory in (2GB -
4GB). I installed it no prob and when I boot the computer everything
runs fine. I go into my BIOS and it recognizes all the memory installed
(4096 MB). When I go into my Windows XP Media Center Edition it only
sees 2GB installed (SiSoft Sandra and others). All the memory is the
exact same PC4200 DDR2 SDRAM 533mhz 240 pin 1GB x 4 made by comstar.
Any suggestions?

 

[Guest]

XP is limited to 4mb only of ram.Youve installed more than its capable of
running,anything less than 4mb youd probably see all,and get all of its
performance..

 

[Guest]

XP is limited to 4mb only of ram.Youve installed more than its capable of
running,anything less than 4mb youd probably see all,and get all of its
performance..

 

[Guest]

XP is limited to 4mb only of ram.Youve installed more than its capable of
running,anything less than 4mb youd probably see all,and get all of its
performance..

I believe it is 4gb - which is what the upgrade was to. When you install 4gb
the bios reserves memory for itself - in mycase about .5gb

Brian