My screen's refresh rate is 60 Hz. I experience no tearing.

Here's behavior of JJ2 regarding fps, according to my experience with the code (BlurredD may negate it if I'm wrong):
- in fullscreen: JJ2 and JJ2+ limit fps to the screen's refresh rate (if obtainable).
- in windowed mode: JJ2 and JJ2+ have no known limits of fps, although both seem to be capped at around 140 most of the time. Unlike JJ2+, JJ2 lies and shows the frame rate as 70 if it's any higher than that.