Playing GTA 5 on my new GTX 1080 and getting the exact same fps as i got on my GTX 780. Played lots of other games at 1080p 144hz with my GTX 1080 and there is barely any difference between the two, i have even tried overclocking it as well to 2063Mhz on Asus Tweak 2 and running at 55 degrees C, my i5 4670K shouldn't be bottlenecking it. What is going on??