Great topic, and there’s a lot of nuance here that gets glossed over in marketing. Let me break down the architecture since the underlying implementations differ more than most people realize. FreeSync is fundamentally the VESA Adaptive Sync standard implemented over DisplayPort (1.2+) and HDMI (2.0+), and it’s royalty-free, which is why AMD opened it up. G-Sync started as NVIDIA’s proprietary solution using a dedicated timing controller chip on the panel for tighter range and calibration, but the “G-Sync Compatible” certification they added later basically just validates third-party FreeSync panels—so a lot of “G-Sync” monitors today are running Adaptive Sync under the hood. The real practical difference comes down to the refresh rate range and low framerate compensation (LFC). If your monitor is 60Hz and your game drops to 30FPS, you need LFC to multiply the refresh rate (e.g., 60→120Hz) so you don’t get double-buffering stutter.
AMD’s FreeSync Premium mandates a 40–144Hz range plus LFC, while NVIDIA’s G-Sync Compatible spec targets 40–144Hz with?
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