My Vue 4 Pro is running on my main 3.2Ghz P4 with Hyperthreading. Hyperthreading is really nice with Vue because Vue reconized it it has 2 cpus. I have also notice with Lightwave have the 2nd logically cpu system runs more efficiently. If you ever curious about difference with hyperthreading, turn it off and run Vue. You will notice a big slugglish difference. In my opinion Dual Core technology is a next logical extension to hyperthreading. Vue should even run better on dual cores because reduce over head of actually having physical cores instead of logical cores. As far as 64 bit OS, it really does not matter if 32 chips can't run it. What matters is 64 bit applications come out, these applications will required 64 bit. I also think it would be foolish for companies to only come out with 64 bit versions of software. 64 bit is not new, Intel has had it for years.. Again this topic was not designed to debate AMD vs Intel but instead I am looking for information on memory requirements/system requirements for running the Ecosystems. In another thread it was mention that one of pictures was done with 512Meg of ram, so I think we are ok.