New
#1
adding memory results in less usable memory
i have a new HP Z400 workstation. it has a new install of windows 7 enterprise 64bit with all updates. the pc came with 6gb of ram installed. i purchased 6gb of kingston memory that was specifically listed for this workstation. the ram is installed as 6 x 2gb modules. slot 1 factory module slot 2 kingston module slot 3 factory module slot 4 kingston module slot 5 factory module slot 6 kingston module. when this pc just had the factory modules it shows 6 gb installed 5.83 usable. it now shows 12gb installed with only 3.23 usable. what is causing the decrease in usable memory as well as what is causing the usable memory to be a fraction of the installed memory?