Minecraft is Lagging Hard-Core?

Whenever I look up to the sky in minecraft, the frame rate goes up. Whenever i look down to the ground, it drops to about 3-4 fps. Is there ANYTHING I can download or buy to make mod packs and servers go faster?

If the 3-4 frames make enough of a difference that it seriously effects your game play, then you don't get that may fps. I'm guessing you average 15-20 if you seriously noticed a change. I think you either need a better computer, or maybe try optifine. It improves fps and overall performance.

3-4 fps means you need to buy a new computer.