I have HP dv7 laptop. Intel core i5 2.53 and 6GB of RAM. but now it is showing 6GB RAM (2.43GB Usable) I Checked both of RAMs separately. on of them that is 4GB it is showing 2.43 GB usable. an second one is showing 2GB (1.86GB Usable). but when I am inserting both of them, again it is showing 2.43GB usable. when it has original windows 7 home premium, it was like this. the computer was working too slowly. it was like that. but when I changed from win 7 home prem. 64bit to win 8 professional 32bit, again it is showing like that.
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The 32-bit version of Windows has limits imposed on memory by Microsoft, usually 4GB on a desktop. To get around this, you will either have to use PAE or switch to a 64-bit version of the OS. I would not recommend the former, as PAE tends to have a slight performance hit, and it will require some sort of advanced hack.
According to this page, the 32-bit version of Windows 8 can only USE up to 3GB of RAM. The reason that you are not being able to use all 3 GB's is because the integrated graphics controller takes up a certain amount of RAM, which becomes unusable for anything other than the graphics controller.
Intel graphics do not have dedicated memory but utilizes some of the computer's system memory. The amount of memory used for graphics may be a fixed amount or may vary up to a maximum amount. It depends on if the computer manufacturer has configured the computer to use a fixed amount, a dynamic amount (varying up to a maximum amount), or a combination of both fixed and dynamic amounts of graphics memory.
According to the manual for the dv6:
Intel Extreme Graphics - Intel GMA 4700MHD - Up to 1759 MB of graphics subsystem memory on computer models equipped with 4096 MB of main system memory (64-bit OS)
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