What is OptiFine?
Optine is a mod that helps you to adjust minecraft effectively. It makes minecraft run more smoothly and use less resources. Besides, it enables you to run resource (texture) pack HD without installing more other mods.
A perfect choice for personal computers that want to run Mincracraft more smoothly! This an indispensible mod for those playing Minec raft with features like FPS boost, Support HD Textures, Variable Render Distance, Antialiasing, Connected Textures…
Optifine for Minecraft 1.7.1 Download: http://www.9minecraft.net/optifine-hd/