HP Pavilion 550 - 155l: CPU - Z says 12 GB of ram, Windows says 4 GB

Hello, firstly I want to say sorry of HP if I broke the rules because I'm new here.

My problem is, I just got a new HP 550 building - 155l with 4 GB of RAM. Then, my friend gave me a stick of Kingston fury X DDR3 1600 Mhz, which is 8 GB for me. I tried to installed the RAM. Then, when I open the information system, its says that I have still 4 GB of ram (3.90 usable). I was very confused, so I went to come and download CPU - Z to see if the RAM stick works. And it is! it is my 8 GB key! And the tab says memory I have total of 12 GB of RAM but why Windows says only 4 GB (3.90 usable)? Is there something wrong? Help, please! You guys can see photos of preferences.

PS Sorry if my grammar isn't very good. I'm not a native English speaker, I'm Thai.

It comes to the n/b system information for Windows and CPU - Z comparison.

It's the provided HP RAM.

It's the fury X 8 GB RAM Kingston

Thank you for every response.

Windows sees only 4 GB because you have mixed densities (4GB + 8 GB) module and the modules of memory other manufacturer.

If you want to use more than 4 GB successfully, then buy a memory compatible pair of bars secured and install them.

Make sure that you remove the other two modules before the upgrade.

See the following URL for guaranteed compatible memory module address. I have used Crucial for example. There are other manufacturers that ensure their modules are compatible.

http://www.crucial.com/USA/en/compatible-upgrade-for/HP---Compaq/Pavilion-550-150

Tags: HP Desktops

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