I just got it for 20$ on steam because of the mods, I also have it on ps3, but I can't even play because of the choppyness. I can play BF3 on medium/high settings. on the benchmark test it runs at around 50 fps but still it gets choppy every 5 seconds.
My specs:
Intel Core i7-2617M 1.5 GHz (2.6GHz Turbo Mode, 4MB Cache)
NVIDIA GeForce GT540 1.0GB Memory
6GB DDR3 at 1333 MHz RAM