Comment by rythie

Yes I know. But if you are running a game on a PC with 8GB of memory and the game can only use 4GB of that (actually 2.7GB in windows), it's not really taking advantage of it, is it?

Also consumer versions of 32bit Windows don't support PAE so only see 4GB of memory (actually 3.5GB after memory mapping of hardware devices) http://en.wikipedia.org/wiki/Physical_Address_Extension and http://msdn.microsoft.com/en-us/library/aa366778(VS.85).aspx