I cant get it to use more than 6 of my 8 processes. But that's really the OS's decision, not GC3s. I remember readinging a year or 2 ago, when I decided to get this AMD processor, that there will be issues with multi threading for gaming (think this is the first true multi-core supported game I've played). Now, if I happened to be doing a lot of other computing, like watching a movie, running huge excel files, all of this simultaneously, then the AMD extra cores truely kick in and begin to shine. But, this is really the OS's decision, as it determines scheduling and cpu assignment. An application doesnt have this ability.
Hence, Intel will be better for gaming (single process using multi-threads), AMD will be better for true multi-process (not multi-thread) use.
Interestingly enough, there do seem to be some GC3 issues as well. I was running an insane galaxy, with 26 races, and I turned on soak. If I kept FOW Off, it would run turns every 8-9 sec. If I disabled FOW, it took 14+ secs per turn. However, when I zoomed into my own homeworld, where only 1 planet was displayed on the screen, it still took 14sec. GC3 should realize that I not currently looking at the entire galaxy and be just as fast with FOW enabled or disabled...but its not.
I enabled quick move as well, but it didnt seem to do anything, while watching all races. So, I think that's broken too, and that would help speed up games as well.
So, I really think the issues belong to Windows and Stardock, not AMD.