Adjust Video RAM size on Windows 7

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I suggest you to refer the steps below and check if it makes any difference:

Method 1

I suggest you to refer the below Microsoft help article to change the size of virtual memory:

http://windows.microsoft.com/en-in/windows/change-virtual-memory-size#1TC=windows-7

Method 2: Change the RAM consumption to maximum.

I suggest you to refer the steps below to Change the RAM consumption to maximum:

1. Press Windows key + R.
2. Type “msconfig” and press Enter.
3. Click on Boot tab, then click on advanced options.
4. Check box Maximum memory, Click Apply and Ok.
5. Restart the computer.

Also refer:

The usable memory may be less than the installed memory on Windows 7-based computers.

http://support.microsoft.com/kb/978610

http://msdn.microsoft.com/en-us/library/windows/desktop/aa366778%28v=vs.85%29.aspx#physical_memory_limits_windows_7

If issue still persists, I suggest you to try installing 64-bit Operating Systemand check.

Hope this information is helpful. Please do let us know if you need further assistance, we’ll be glad to assist you.