Revisiting the points I was trying to make.

Without HT on, Vue is definately utilising both processes to the max (100% each for the entire job). During this process running other applications becomes clunky and I often give up (save rendering until night).

With HT on I can now use other applications with ease with only a 5% cost to rendering time.

Sacada.

PS. davidrivera: Specs = 2.66 each and its vvvveeeeerrrrryyyy nice. Though I create more complicated scenes now I have more power. My latest image (You Cheated!!!) had a .vue file of 215 megs, included DOF and took over 28 hours to render (with HT off) and both processors at 100%.