Pretty sure you should cap your FPS, I think that having an insanely high FPS = your GPU being alot hotter than it needs to be, I think I capped mine at 100, even above 60 there isn't much difference at all to the average human eye. I mean, I could be wrong, but I'm pretty sure I remember long long long ago learning about too high FPS making your GPU hotter and thus degrading faster over time, which is why FPS caps/limiters are used in places. Consoles also use them alot because of that reason.