I've been trying to play the better minecraft modpack from forge and no matter what I seem to do I get low fps. With my render distance at 10 chunks i average around 50-70 fps despite my gpu, cpu, and everything else is barely being used. They never go above 40% usage, ive dedicated 8gb of ram to minecraft but it doesnt use over 4. My drivers are up to date. My PC specs are i7 8700k, RTX 2080ti, 32gb ddr4 ram, and its installed on an ssd. Do you know what the issue is?