Quote - Looking at how Cloth Room simulations behave, I think the term "Improved multi-processor support" is technically true, but not what you'd think it really means.  I have a quad core machine.  This cloth simulation fully occupies one core, every other second it uses about 1/3 of another core (overall about 1/6th of a second core).  It seems to be "just barely" multiprocessing.

That's typical of an app which doesn't do multicore. Every cycle it goes "Hey, a nice free CPU! What if I used this one?", and switches over, negating all CPU buffers, prefetch routines and other nifty optimization systems your computer might have...
That's what P6 does on a multicore computer, unless you limit it to a single core.

So that means the cloth room is still the old, single core routine.