voncreutz

Can anyone tell me why my newly installed 4 Gig of ram shows up as 3328 Mb when I run dxdiag from the run dialog box?

Thnkful for any ideas.

Ramomar

Do you have a 32-bit or a 64-bit operating system?

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dannaswolcott

32 Bit OS will see 3GB, it will not see the full 4gb. How ever, If you have a 64 bit OS, Then it should see all the ram, Unless you have on board video. Then that can take memory away from windows.

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StrangleHold

Windows 32 bit can see upto 4gbs. not 3. Physical Memory Addresses are divided up between your System memory (Ram)/ and you PCI memory addresses/ Bios/ Video cards/ networking/ Blah Blah Blah.

So the full amount of 4gbs. thats installed will not be available because part of the upper 2gbs. addresses have been used.

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raoul_1101

In more layman's terms; because 32-bit addressing can only address up to 4GBs or memory, and many components need their own memory, the computer has to share the space with other components. An example of such, if you have a video card with 128mb of memory, that has to be mapped onto the system memory. Sooo, you're already out 128mb of your maximum 4GB, and there's still many other components that need system memory as well.

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voncreutz

Hi, thanks for all the help. Yep, I've still got a 32 bit OS (XP Proffesional)
I also do have onboard video. It's a Asrock A780GXE with 128Mb sideport memory.

Just got confused about this since I installed 4 Gig on a few computers at work with Windows XP 32 bit, and all of it showed up when I ran dxdiag..

Thanks again

reddevil6

read here

Ram limits for XP an vista 32 & 64 bit OS

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voncreutz

Thanks for the info....guess a 64 bit OS will be my next investment