need help about win7 ram

i have a 32bit. when i go on my system summary the part where it says ” installed memory(ram)” it says 6gb but then by tht it says (2.75gb being usable). how do i use all my 6gb ram instead of 2gb i even tried msconfig tried putting maximum ram usage but still dident work.
Answer #1
Maximum Ram used by 32 bit is just over 3 GB…And 2.75gb is available for use…The rest is used by the system..
If you want full use of all your ram…You might want to move to 64 bit…
Answer #2
By installing 64bit Win7
Answer #3
Install 64 bit Windows 7. However remember flash is not avaliable for 64 bit usage.