VRR (variable refresh rate)
Also searched as: vrr · variable refresh rate · adaptive sync
What it means
Normally your monitor refreshes on a fixed metronome and your frames arrive whenever they're ready — when those don't line up you get tearing or stutter. VRR lets the monitor wait for each frame, so it draws them the instant they land.
More detail
G-Sync (NVIDIA) and FreeSync (AMD) are the two brand names for it. It's the single biggest jump in how smooth a game feels, and it costs you nothing once your panel supports it. …
In the Blackbook
The deeper explanation continues inside the app. The Blackbook publishes its verdicts here — the full write-ups stay in the book, on your rig, next to your own measurements.
The Compy Blackbook holds 191 graded entries like this one, judged against your hardware — and every change it does make is reversible, with the receipt to prove it.
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