[PERFORMANCE] Uncapped FPS now causing monitor to work at 30hz

When running the game with an uncapped FPS, my monitor (which is 144hz and using FreeSync) will drop to 30hz, making the game run and stutter terribly. There are two ways that I have tested to fix this, but neither is an ideal solution so much as a temporary fix. The first option is to turn on V-Sync, however that would introduce an input delay that I would like to avoid. The second option is to cap the FPS to 144. While that is what I intend to do for the time being, this would make the game slightly less responsive than its uncapped FPS. At least, that is my understanding.

To make sure it wasn't an issue with my hardware I tested the issue with another game with an uncapped framerate, Lovely Planet. It worked perfectly fine at 1000+ FPS, with my monitor staying at 144hz.

I don't t think Patch 8.16 is responsible. Instead, I think the latest AMD drivers might be causing this, as I first noticed this after updating to 18.8.1. I'm using an AMD RX 480.