GT 730 (Overclocked; Core Clock at 820 and Memory Clock at 550[I didn't change any voltage settings])
i7 860 (2.80 GHz)
I play on this settings:
720p (1280x720) / Water Quality:Lowest / Graphics Quality: Fastest / Anti-aliasing, Sun Shafts and Ambient Occlusion turned off
And I can get something between 24 - 28 FPS (Average: 27). But it's still playable.