I just got a gtx 770 for my computer with i7 4770k and high quality parts, and I can play payday 2 and skyrim with ULTRA settings. I decided to test minecraft with a 512x512 pack. I was getting 30-45 fps average with a max of 60, and I've heard that the gtx 770 is supposed to get 100 fps with 512 pack, shaders, and ULTRA settings. What is happening?