Generally it's determined by the hardware, for instance I don't think any 64-bit platforms allow for a full 64-bit-worth of VM, they limit to something like 40-bit to save on hardware costs. And it ...

At its Analyst Day last week, Intel finally gave notice that it would be scrapping the 32-bit limit and launching a 64-bit platform for the new 22nm chip. According to Intel, 64-bit support will ...

I am pretty sure there are other benefits of going 64 bit besides using more RAM than 2 GB. Also, note that the 2GB limit is per process, not per "application". So running multiple concurrent ...