Hey I need some help fixing a lag issue on the vanilla mod pack, as I am peaking at about 5 fps now. I downloaded a few mods, including twilight forest, backpacks, tree capitator, and NEI. All of them are the correct versions and have the necessary core mods. I used to be able to run these fine, but then my fps started dropping majorly. I've tried quite a few things, including reinstalling java, technic launcher, overclocking, and tinkering with my graphics card. As an experiment, I ran hexxit, and under the same settings I easily get 40 fps. Any advice on what could be causing the low fps?