Only by using the x64 version of this OS which will recognise your system ram correctly. The 32 bit version is limited to 4 GB max and that's before 'hardware considerations' relating to graphics etc are taken into account (even though your graphics card has its own memory, it still affects available system memory in such cases). It may be comforting for you to know that the even though all your memory isn't viewable under Windows, it will still be in use. Have a read up on the internet about the 4 GB memory limit of x86 (32 bit) versions of Windows. Intel mentions details here: http://www.intel.com/support/motherboards/desktop/sb/CS-028426.htm?wapkw=(x64+memory+limit)#memorylimits as just one example I've found, there's probably many more if you search.