I'm in the same boat... BUT heavily modded MC is the only thing that bogs my PC down. Everything else I do is adequately fast and no problems. Its the main reason I can't justify upgrading my PC.Damn I need to add more RAM and upgrade my puny 560 TI to a 970. :/
I can only average a mere 40 fps. Peaks at 60 odd and can sometimes dip slightly below 25.