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Windows not using all available memory


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#1
thequintz

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Memory installed 4gig, BIOS displays correctly Base Memory 640K Extended Memory 4192256K Total Memory 4193280K.
However windows shows:
Physical memory available to Windows 2,882,028 KB Total paging file size set for all drives: 2046 MB HD is 320 GB partitioned into 4 logical drives.
I have very few systems installed on this system (all of which were and are installed on other systems in the network), the installed systems mirrors another computer
on this small home network but this one has fewer software systems installed.

Other systems display the correct amount of available memory to Windows

Any help to resolve would be appreciated.

Mel
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#2
SpywareDr

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Various devices in a typical computer require memory-mapped access. This is known as memory-mapped I/O (MMIO). For the MMIO space to be available to 32-bit operating systems, the MMIO space must reside within the first 4 GB of address space.

For example, if you have a video card that has 256 MB of onboard memory, that memory must be mapped within the first 4 GB of address space. If 4 GB of system memory is already installed, part of that address space must be reserved by the graphics memory mapping. Graphics memory mapping overwrites a part of the system memory. These conditions reduce the total amount of system memory that is available to the operating system.

The reduction in available system memory depends on the devices that are installed in the computer. If a computer has many installed devices, the available memory may be reduced considerably.
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#3
rshaffer61

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For example, if you have a video card that has 256 MB of onboard memory, that memory must be mapped within the first 4 GB of address space.


This is only true if the video is built onboard as a add on card does not use the system memory then. Just wanted to make sure that was clear.


Physical memory available to Windows 2,882,028 KB Total paging file size set for all drives: 2046 MB HD is 320 GB partitioned into 4 logical drives.


Where is this info being shown?
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#4
Neil Jones

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For example, if you have a video card that has 256 MB of onboard memory, that memory must be mapped within the first 4 GB of address space.


This is only true if the video is built onboard as a add on card does not use the system memory then. Just wanted to make sure that was clear.


Physical memory available to Windows 2,882,028 KB Total paging file size set for all drives: 2046 MB HD is 320 GB partitioned into 4 logical drives.


Where is this info being shown?


2,882,028 comes back as 2.74Gb.
I would argue the original poster has a 32-bit O/S and onboard graphics, even though if you add everything up the system is only showing 3Gb as standard with 256Mb of onboard graphics, though I have seen boards that allow you to specify up to a 1Gb of onboard graphics, why you'd need such an insane amount is anybody's guess.
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