Phenom II X4 955 @ 3.2 GHz
4 GB (2x2GB) Mushkin Enhanced @ 1333 MHz
GTX 560 Ti OC'd @ 950 MHz
ASUS M4A87TD Evo
(others parts are redundant to my point)
My new build:
i5 2500k @ 3.3 GHz
8 GB (2x4GB) G.SKILL Ripjaws @ 1600 MHz
GTX 560 Ti OC'd @ 950 MHz
Gigabyte GA-Z68XP-UD3P
As you can see, the only real difference is my CPU. In my previous build, the CPU was the bottleneck, as I was only getting 35-45 FPS in Fallujah. With my new build (same graphics card), I'm getting approximately 60-95 FPS in Fallujah.
If you guys are planning on upgrading, the biggest performance increase in PR will result from upgrading your CPU.

