Have you had any further opportunity to test threading in the Fear engine? I have looked at this myself on the same system as you are using (Phenom 9600BE and Asus M3A32-MVP) but i found the results unusual.I use a Logitech G15 keyboard to monitor core and memory movement and usage. What I have found so far is there is one core doing most of the work but the other 3 are aslo in use, as much as 25%(this is BTW in XP 64)