Really the only things I’m seeing in the settings that could get you a few frames are lowering the resolution, and turning shadows down further. Beyond that, the answer is “buy a new computer”. The i7 3770 is by no means an impressive processor, and you’re putting double duty on it since you don’t have a dedicated graphics card.
You’re also underclocked compared to the published specs, so I assume you’re in a laptop where heat is a major bottleneck as well?