Same problems here. GPU 6870 @ 50-70% and CPU AMD FX 8120 @ 35-60%… By the way I also have low fps usually between 20-40… (Auto Detect, doesn’t matter how low I go)
And yes I checked my PCI-E bandwidth already, it’s on x16 2.0 and also removed an reinserted ram both are in dual channel. (12 GB)