>>713914508
partially true

v/free sync work via division of your fps against the refresh rate of your monitor. as long as the FPS = a number that can equally divide by your mhz you gucci mang. no tearing, looks smooth. the number can dynamically change as fps goes up or down.
normal vsync is just a flat rate lock, it cannot adapt to changes in fps...thats why it sucks dick and causes input latency