Area: Revenant's Toll @ Crystal
CPU: i7 4770K @ 4.5GHz ~ 40% CPU Utilization
GPU: GTX680 SLI ~ 60-70% GPU Utilization
Screen Resolution: 2560x1440
FPS: 35-40
Graphics Setting: Maximum Preset
No matter what you do, it will always dip because the CPU can not tell the GPU's to draw the people fast enough. It is CPU bound when it comes to people. I overclocked from 4.5GHz to 4.7GHz just because I was curious and saw an increase of about 3-5FPS. So if you want more FPS, get a faster CPU. The game is not coded to make use of every CPU core. Someone said it was coded for only 1, I doubt that, I'm thinking more like 4 cores, but that is beside the point. There is no fix other than faster CPU speeds.