Quote Originally Posted by kujoe2002 View Post
32bit will only recognize 3.25GB OK. 64 Bit Win 7 home premium can see 16GB. Win 7 pro, ultimate can see as much as you can fit.
This is probably true in many cases, but, in reality, it depends on what other hardware requires addressable memory space. The last 32 bit Windows install I ran saw more than 3.5GB of the installed 4GB.

Quote Originally Posted by ImaNihilist View Post
A 32-bit *nix distro won't be able to use all the RAM either.
Any recent 32-bit *nix distro will likely support PAE (36-bits or 64 GB of addressable memory).