[Ansley]

Hey, recently upgraded my computer. I have a P8B75-V Motherboard with Core i7 2600K. I've installed 16GB memory (2*8GB). But when I go to my computer properties, it shows 16GB (3.47 GB usable); is there any problem with the memory or something ? Or is it supposed to be like this.
I use Windows 7 Ultimate 32 bits.
Can anyone help me on this, please.

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I use Windows 7 Ultimate 32 bits.

Here is your problem. A 32 bit OS will only utilize at best 3.5 to 3.7 gigs of memory total.
In order to use all 16 gigs of memory you would need a 64 bit version of Win7.

[rshaffer61]

I use Windows 7 Ultimate 32 bits.

Here is your problem. A 32 bit OS will only utilize at best 3.5 to 3.7 gigs of memory total.
In order to use all 16 gigs of memory you would need a 64 bit version of Win7.

[NightFury12]

Hi
please check the below table. The 32Bit Operating system is limited to use upto only 4GB of Physical memory(RAM). So to avail the benefit of having 16GB of RAM migrate to 64Bit Operating system.

The following table specifies the limits on physical memory for Windows 7.

Version	              Limit on X86 or 32 bit    Limit on X64 
Windows 7 Ultimate             4 GB               192 GB
Windows 7 Enterprise           4 GB               192 GB
Windows 7 Professional         4 GB               192 GB
Windows 7 Home Premium         4 GB                16 GB
Windows 7 Home Basic           4 GB                 8 GB
Windows 7 Starter              2 GB                  N/A

Check the below links for more info:
Link 1
Link 2

[iammykyl]

Hi Ansley,

With windows, how much Memory Your computer can use is dependent on the version you have installed.
You have installed Window7 32bit. The usable memory showing is correct because that is max that can be addressed, (seen)
You need to install a 64bit version to address more memory.

The actual Microsoft product line has also implemented restriction,
Up too and including 16GB, > http://www.newegg.co...N82E16832116986
The next step up if you want to use all the memory that your Mobo is capable of holding, > http://www.newegg.co...N82E16832116992
and included Xp Mode.