How to improve Minecraft FPS?

So I just finished my first computer build which I made primarily for gaming. I anticipated getting higher FPS on the build than I did on my laptop, but I found that is not the case. On my MacBook Pro Retina (2.3 GHz i7, 8 GB 1600 MHz DDR3 RAM, GeForce GT 650M 1GB graphics card), I got around 30 FPS. I tested the same save on my build (i5 4670K 3.4 GHz, MSI Z87-G45 Board, 1 stick of 8 GB 1600 MHz RAM, no graphics card) and got 30 FPS as well. I was OUTRAGED when I added another stick of 8 GB RAM today (Up to 16 GB of RAM) and received once again, you guessed it, 30 FPS. Shouldn't I have seen a dramatic difference with the addition of 8 more GB of RAM, not to mention I'm know utilizing the Dual Channel memory with the second stick of RAM? I've heard optifine boosts FPS, but I can't see it improving my FPS 200% considering I have previously used it on my laptop and saw little to no difference. Whereas my friend receives on the upward of 120 FPS on his laptop which only has 4 GB of RAM, 2.3 GHz i7, and I believe a GT 650 as well. Was wondering what could help FPS for the time being, and if a graphics card would even display an improvement.