Windows 7 detects only 3GB when 4GB is currently installed

September 2016


Windows 7 detects only 3GB when 4GB is currently installed


Issue

Windows 7 detects 4 GB (2.94 GB usable) of installed memory.

Solution


For 32-bit versions

32-bit version of Windows can not manage more than 3GB of RAM For more information: http://ccm.net/faq/1571-why-windows-is-not-detecting-the-4-gb-of-ram-installed

For 64-bit versions

Most of the recent motherboards (less than 4 years) can manage more than 3GB of RAM. If your PC is unable to handle more than 3GB of RAM it is probably due to an incorrect BIOS setting.
  • Open the BIOS.
  • Go to Advanced > North bridge Chipset configuration > Memory remap feature > Enabled.

You also need to perform the following operation:
  • Click on Start > Run .
  • Type the following command and press Enter: msconfig
  • Go to the Boot tab and click on the Advanced options button.
  • Check "Maximum memory" and adjust your settings.

For PCs with and integrated GPU

  • Integrated graphics chipsets use the main memory of the PC as video memory. This amount is deducted from the total memory.
  • E.g a 64 bit OS: 8.00 GB (6.20 GB usable) because 1.80 GB is used by the graphics chipset.

Related :

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