So I had gotten a new PC with the latest NVidia card. I was getting 60FPS (I was actually getting 300FPS but toned it down to 60FPS).But when I played Minecraft, I experienced what I thought was lag. I did all the standard tweaks, to Minecraft to Optifine and to NVidia but nothing helped.After a couple of weeks of frustration, I realized the choppiness was when I moved the mouse quickly. If I made smooth mouse movements, there was no lag. <Face Palm>. I then checked my Windows Mouse Properties and unchecked "Enhance Pointer Precision". It was ON by default. After unchecking it, the choppiness went away. Now I am one happy Minecraft camper.