Possible FPS issue fixes in Pixelmon Dark: 1.) (What worked for me) Deleting betterFPS and CustomMainMenu mod, questionable algorithms 2.) Increasing priority of Java process in the task manager to "Highest" 3.) Downloading Dark without technic launcher (more ram options, and perhaps the same case as 1.) ) 4.) (Softfix) Reducing render distance (uses up a lot of CPU resources) 5.) (Sounds dumb) deleting Optifine 6.) Lowering MipMap levels to 0 7) Windows 10: Power Options -> advanced -> High performance Credits to Zane, Mosa, Winglet, Sjeng for 5) , 3), 6), 7) Feel free to post more solutions and I´ll add em to the list! IMPORTANT EDIT: I highly advise keeping the Foamfix mod for now, without it my performance was terrible. Betterfps and Foamfix also might intervene with each other so tomorrow (24.9) I'll reinstall betterfps and remove foamfix and see what happens then. I plan to do Benchmarks for every Algorithm and a lot of mod combinations IMPORTANT EDIT 2: I appreciate any data you guys can send me, so if others gather some benchmark data aswell, I'll really appreciate it! More data from multiple systems means I am able to present more representative results for everyone. The entire process of gathering and analysing results may take up to a few days, depending on how fast I am.