[rbN.]

I am really stupid when it comes to CPU/GPU/anything of a computer, but if you want, my rig:

Processor:
Intel® Core™ i5-2320 CPU @ 3.00GHz (4 CPUs), ~3.0GHz
Memory:
6144MB RAM
Video Card:
AMD Radeon HD 6800 Series

I'm getting like 40 FPS on Ultra, so I'm pretty sure GPU won't matter so much