On Wed, 2008-10-01 at 11:17 -0500, Richard Shaw wrote:
Maybe someone can word this better than I but here it goes. The memory limit is not really tied to the OS "TYPE" (i.e. Windows XP/Vista, Linux, etc) but more to the architecture (32-bit vs. 64-bit). As far as I'm aware, all 32-bit OS's will have this limitation and all 64-bit OS's will not. You can get Windows XP, Vista or Linux in both 32 and 64-bit flavors.
So to answer your question (c), yes, if you switch to a 64bit version of Linux you will be able to use all 4GB.
Does that work on only 4Gb or more? I have 2Gb Ram, and running 64bit, and still only see 1.8Gb of memory, as it did with 32bit as well.