Attached Link: The 4GB Windows Memory Limit: What does it really mean?

I was under the impression that 32bit windows can access a max of 4gig RAM. (2gigs for the kernel and 2 gigs for applications.) This is regardless of the number of threads. 64 bit OS's running 64 bit programs don't have this limit. This is also one of the reasons why there is such a push toward 64 bit applications in the 3d world.

I could be wrong. I'm more familiar with Macs and their limitations.

Here is a quick link I googled:
http://www.brianmadden.com/content/content.asp?ID=69