I recently got a new computer that runs Minecraft at best graphics settings with Optifine at 60 to 250 fps. In Tekkit i got 5 to 35 fps with the same settings, and i get 60 to 200 fps with lowest settings. I was wondering what i could do to improve my performance. Specs are windows 7 home premium 64 bit. Intel i7-3610QM CPU 2.3 Ghz, 8GB RAM, Nvidia 650 m graphics card, please help!