Since swapping out my old GTX 970 for an RTX 2080 I've been getting fps of between 25 - 40 fps. Not a drop of 25 to 40, but in total. I do have settings on full at 2560 x 1440 but I was easily getting 70 to 90 fps with my old card. The only thing that's changed in my setup is the new card. Any ideas?