Need help with bottleneck

Have you considered overclocking your cpu?
It might increase performance with games that use a single core, and since it's a BE it shouldn't be that much work.

Overclock your CPU. Start googling guides on how to overclock your particular CPU. And make sure you know the rest of your specs, particularly your mobo. I don't oc AMD CPUs, so I would be googling just like you if I wanted to provide suggested guides.

When you do figure out how to overclock your setup, be very aggressive. Lots of voltage will remove years of life from your CPU, but you should be upgrading that mediocre CPU/mobo long before it will die on you.

Well, firstly the pci-e 2.0 port is hindering the card anyway. Lower types of graphic cards that use 3.0 like 660/70 or 7850/70 feel little difference between 2.0 and 3.0, but higher end cards like yours will be crippled.

It's besides the point of your thread. I know. I'm not very helpful :(

First I would do some tests to make sure that your processor is actually a bottleneck. The only real way to do this is to log a bunch of information while you put your machine through whatever you think is causing the bottleneck to happen. What things are maxed out when the issue occurs? If your CPU is maxed the you're probably right. It could possibly be memory reads/writes, HD read/writes, GPU, etc... If no component is maxed out then there's a good chance that it's a bus issue which would mean replacing the mobo.
On a side note: You actually want to make the bottleneck larger if you think about things logically. If you shrink a bottle neck then liquid comes out even slower so you want to enlarge it to remove the obstructions.

If I unlock my "Extra" Phenom X2 cores, will it change something?

Guys? I have a question. ^