The new Intel Quad Core i7 cpus (920,940,965) which are available now are multi threaded. This gives you 8 cores effectively and windows sees them as 8 and so do applications. In Carrara for example you get 8 render tiles and it flies!
Unfortunately the Vue 7 Complete 4 CPU limit means you don't utilise the core i7 fully because it won't use all of the threads which is a real shame.

So if you have, or are thinking of getting, a core i7 system, you may want to go with Infinite although IMHO I think Eon are behind the times here and should remove the cpu limit.

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