AMD's Phenom II X4 955 3.2 Ghz
HD 5770 1GB
8GB RAM
I have textures set to the highest, LOD distance set to mid, SSAO on, light shafts on, Bloom off, Vsync on, all blurs and DoF off, shadows mid, AA on.
1080P
I get ~30 fps most of the time raising to ~40 fps and droping as low as ~20 fps in intense areas like the mist/never ending battle in act 2.
@TheVoxelman on twitter