Total memory of 4 GB newly installed does not appear in the Task Manager

Total memory of 4 GB newly installed does not appear in the tab of the Task Manager performance. Only 3.3 GB appears. Is something wrong with the chopsticks of mem or mem from Vista 32 bit OS limit uses at this level. I have SP2.

http://support.Microsoft.com/kb/929605

"System memory shown in the system information dialog box in Windows Vista is less than expected if the 4 GB of RAM is installed.

This behavior is the expected result of some hardware and software factors.

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

For example, if you have a video card that has 256 MB on-board memory, that memory must be mapped in the first 4 GB of address space. If 4 GB of system memory is already installed, the part of this address space must be reserved by the graphics memory mapping. Graphics memory mapping replaces part of the system memory. These conditions reduce the total amount of memory available to the OS System.

The reduction in available system memory depends on the devices that are installed in the computer. However, to avoid potential driver compatibility issues, 32-bit versions of Windows Vista limit the total available memory to 3.12 GB. See the section 'More information' for more information on potential driver compatibility issues.

If a computer has many features implemented, the available memory can be reduced to 3 GB or less. However, the maximum memory available in 32-bit versions of Windows Vista is typically 3.12 GB.

See you soon.

Mick Murphy - Microsoft partner

Tags: Windows

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