OptiFine HD C6 Multi-Core is important for low FPS PC or laptops. OptiFine HD C6 Multi-Core can help your Minecraft to run faster that usual and increase FPS. For a single-core PC or laptop, it will increase your FPS for Minecraft. For a double-core or multi-core PC or laptop, it will decreases time for the world loading.
OptiFine HD C6 Multi-Core is compatibility for only Minecraft 1.2.5, OptiFine HD C6 Multi-Core will not work for other Minecraft version; 1.2.4, 1.1, 1.0, etc.
Sorry for no image example because it is only an invisible mod that doesn’t makes different to the Minecraft exept for the Video Settings.
Minecraft-ters 