I'll just get to the point. I have a ~57GB clip to render, which is ~37 minutes in length. The render time at 1080p 60fps was well over 4 days. I left it rendering overnight, and sure enough it was still going, around 4 days left till finish. I know a clip that size at that length would take a while to render, but I don't believe it should take that long...
I know that Hitfilm is a GPU based editor, so I think the issue is that it's not using up all or most of my GPU's horsepower.
Here's the jist of my system specs: Intel i5 3570K overclocked to 4.3GHz, AMD R9-290, and 16GB of RAM at 1866MHz.
And yes, I have tried reinstalling Hitfilm. Did not help. Any ideas on how to fix this?