Emulation = CPU intensive
Computer games = GPU intensive
Totally different concept.
PCSX2 needs strong single thread performance and is using primarily 2 cores (3 cores if MTVU hack is enabled). Bulldozer has decent multi-threaded performace but that's not what's important for here and now with PCSX2.
So 3.1 ghz with 2 cores utilized on a Bulldozer = garbage performance. In fact, if you look at the FFX-2 benchmark thread you will see that Bulldozers are around the old Athlons in performance.
http://forums.pcsx2.net/Thread-CPU-Bench...d-on-FFX-2
The best thing you can do is overclock to about 4 ghz on your CPU (watch your heat!), set your affinity to even numbered cores, use MTVU, EE timing, and VU cycle stealing and play around to find out what works best.
For socket AM3+ consider the Piledriver CPUs. It was a big step ahead in performance. FX6300 is best deal overall.
Just to add disable turbo boost. It just causes too many fps headaches due to varying clock speeds.