I don't think that there's something wrong, really. I play GTA V at mostly Ultra except for the Grass and AA which is only FXAA and running in "3,5K" I guess as I'm using frame scaling to 1,5x the resolution (but these settings are the same as having frame scaling off and using 4X MSAA) I'm OC'ing my GPU to 1,5Ghz Clock Speed and 4,15 Ghz Memory Speed and mostly I get above 60 FPS, but there are these parts where I get like 48 FPS and it annoys me. The GPU usage is 98% on 66ºC avg and the CPU usage is 60% avg for the first core and 40% avg for the second (I haven't checked all of them) and my CPU gets really hot, with 72ºC on avg.