Do you need 32bit or 64bit for 4gb of ram?
You can use either a 32bit or 64bit operating system (OS) for
4GB of RAM.
4GB of memory is the limit a 32bit OS can handle, this includes
any memory that your graphics card has, so your computer may
recognise only 3.5GB of RAM if you have a 512MB GPU.
You will need a 64bit os that will use all of the ram.