Attached Link: http://www.devx.com/amd/Article/16018/2907?pf=true

My understanding is that the limit is 4GB of virtual address space. You're right, compatibility mode won't raise that limit. Since the cpu is running in 64 bit mode for the OS though, the application can use the entire address space without having to share it with the kernel whil will be loaded above 4GB. You'll also gain any performance enhancements from running a 64 bit OS on 64 bit hardware. AAT least that's what I glean from the articles I've read. I'm no hardware guru by any means. Anyway, I somehow doubt that Poser would be a very simple or clean recompile to 64 bits. IBM supposedly did DB2 in a couple of days but I suspect it was much cleaner code and didn't include a raft of 3rd party add ons like the face room in P5. Of course, they could take advantage of recompiling just the core code but...nah.

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