Screen Tearing & Lag

So I've been playing Minecraft for a couple years now. I've been experiencing lag with 120+ FPS. Also, I have been seeing screen tearing still with 120+ FPS. If there is any way besides Vsync, tell me please. I get FPS drops even though I have 120+ FPS. For example, I'm walking around in a singleplayer world with 120+ FPS... I walk around and I get a HUGE lagspike with still 120+ FPS. An example for screen tearing... In any world (Singleplayer/multiplayer) with 120+ FPS and half of my screen is not sync with the other half. This bug happens still even though I have 600 FPS.
-Why is this happening and how do I fix it?