Apparently we've both just listed broken games then, because AC4 runs horribly on PC; the i7 probably makes little difference. And it's also running 4x MSAA in that video, which is quite a bit more demanding than the SMAA in the PS4 version. The BF4 DF singleplayer video is still the 750 ti managing similar performance in a GPU-bound location (where PS4 should have the advantage of making fuller use of the GPU's power).
Also, I think we might be steering too far off topic, so we either need a new thread for such discussion, or continue in private messages.