Minecraft is not a well-optimized game, so with this modpack, you'll be able to achieve frame rates you didn't even know were possible, but without the need to scale down the graphics too much. It is possible to change a lot of things in the graphical part of the game, be it rendering, particles, resolution, everything you can imagine. If performance isn't what you're looking for, don't worry, as in this modpack you can also find mods that put incredible resources from resourcepacks and shaderpacks, such as connected textures, custom mob models, animated textures, textures with transparency, and much more.