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Not all of my memory is usable


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#1 ThomasDG

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Posted 30 August 2012 - 10:59 AM

I have a computer that is running Windows 7 Ultimate 32-bit. It has 6 GB of RAM installed, but it says that 3.00 GB are usable. My understanding is that Ultimate 32 bit can handle 4 GB of RAM. What do I have setup in correctly?

Thanks,

Thomas

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#2 narenxp

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Posted 30 August 2012 - 11:04 AM

You have to install windows 7 64 bit OS to utilize 6GB RAM

#3 ThomasDG

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Posted 30 August 2012 - 11:09 AM

Thanks for the help. I understand that to get 6 I have to have 64 bit, but my understanding is that I should be able to use 4 GB because it is Windows 7 Ultimate

#4 rotor123

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Posted 30 August 2012 - 11:11 AM

3Gb is about right the rest of the 4Gb that 32 bit can recognize is used by the hardware addresses.

The usable memory may be less than the installed memory on Windows 7-based computers
http://support.microsoft.com/kb/978610

CAUSE
This is expected behavior on computers that are running Windows 7. The reduction in available system memory depends on the configuration of the following:

The devices that are installed in the computer and the memory that is reserved by those devices
The ability of the motherboard to handle memory
The System BIOS version and settings
The version of Windows 7 that is installed (For example, Windows 7 Starter Edition only supports 2 GB of installed memory.)
Other system settings

For example, if you have a video card that has 256 MB of on-board 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.


Hope this helps
Roger

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#5 ThomasDG

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Posted 30 August 2012 - 02:08 PM

Thanks for the help




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