4G memory Win7 only recognizes 2.99G normal?

My computer, not the system takes up so much memory, but the system only recognizes so much, it is reasonable to say that there is a minimum of 3.25GHz? The graphics card is 9600GT, it is not a set display, it is impossible to occupy the system memory for video memory (learning view subject)

Not 32-bit Win7 will be able to recognize 3.25GB memory, which is also related to the graphics card memory, graphics card memory It is also necessary to occupy the addressing space, so it is also possible to recognize only 2.99GB.

Comment: If you need to expand the system memory, you can adjust it through the graphics card BIOS, but installing the 64bit system is the best solution at present.

Win7 system will reserve a lot of memory for hardware by default