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Is the RAM being used?

A

Aarondv1

n00b
Joined
Oct 13, 2014
Messages
37
Here is a screenshot of the Windows System information and a CPU-ID

I added 2 strips of 4 GB RAM after this system was already in use for a few years,
The computer recognizes it and it can be seen on the BIOS when starting up, but in the Windows System it says only 3.25 GB is 'usable' ???

Is this system not using all the RAM? How can it be active?
THANKS
yrEE4
 
Are you running 32bit? You need 64bit to access all the ram.
 
you need to install 64 bit windows. you are currently running 32bit which has a 4GB limit.
 
Armenius said:
If you don't want to install 64-bit Windows you can try enabling Physical Address Extension (PAE).

https://msdn.microsoft.com/en-us/library/windows/desktop/aa366796(v=vs.85).aspx

But there is no reason to not run a 64-bit OS in this day and age unless you have 16-bit programs that you need to run.
Click to expand...

This actually requires the program to also suport PAE, which almost nothing does. Unless you're only running SQL server or other applications that support PAE (and also not the most recent version that drops PAE support), then you need 64-bit Windows.

There was a point where I had to constantly explain this to people so it's a bit of a sticking point for me. Windows only allows a 2GB kernel/2GB application memory partition for apps that don't specifically support PAE (which is really annoying to program for).

I believe that Windows 7/8.1 allows you to install the 64-bit version using the same license you used for the 32-bit version. If it's an OEM copy of Vista you might need to buy another license.
 
PAE allows the nonpaged pool of the operating system to address all of the physical memory in your system by making the PTE 64-bits wide. 32-bit programs that are not LAA or support large pages can still only page a maximum of 2GB of memory regardless on whether or not the underlying OS is 64-bit.

That being said, I did just discover that the 32-bit version of Windows 7 is limited to 4GB of usable memory when PAE is enabled. OP will have to move to 64-bit to use all 8GB with W7.
 
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