I use Large Address Aware and it makes a huge difference in the speed of Bryce. And it does see all 8 cores on my machine. Another thing is that it allows Bryce to use 3 gigs of memory instead of 2 which makes a hell of a lot of difference in render times.

The problem is that after a while using a water cooled 8 cores and 32 gigs of ram  I tend to get used to it and it doesn't seem so fast anymore:) Thats what I found so I got a ATI 7970 Matrix graphic card with 3 gigs of ram. After a while same thing. The need for speed seems to be the thing now and I am no different than most when it comes to that it seems a lot of us seem to be bitten by the speed bug:) no matter what our age or what we use our computer for.