RTSS (RivaTuner Statistics Server) has different frame limiter modes, and choosing the right one can make a difference in gaming performance. Here’s a quick breakdown of what they do and when to use them.
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Async (Default Mode)
This is the standard frame limiter mode in RTSS. It keeps one frame buffered to ensure stable frame pacing.
When to use it:
- Works well for most games where ultra-low latency isn’t a priority.
- Helps keep frame times consistent, reducing micro-stutters.
Things to consider:
- The buffered frame can add a bit of input lag, which might not be ideal for fast-paced games.
Front Edge Sync
This mode syncs frames to the start of the refresh cycle, aiming for smoother animations and better frame pacing.
When to use it:
- Good for games that rely on precise frame timing, like rhythm or simulation games.
- Can be useful when using Scanline Sync to control screen tearing.
Things to consider:
- Needs some tweaking to get the best results.
Back Edge Sync
This works similarly to Front Edge Sync but syncs frames to the end of the refresh cycle.
When to use it:
- If you’re fine-tuning tearline placement with Scanline Sync.
- If Front Edge Sync isn’t giving the results you want.
Things to consider:
- It’s another advanced setting that might take some trial and error.
NVIDIA Reflex Mode
This integrates NVIDIA Reflex into RTSS to lower system latency by reducing the render queue.
When to use it:
- Best for competitive games where every millisecond counts.
- Works well if a game doesn’t have native NVIDIA Reflex support.
Things to consider:
- Only available if you have an NVIDIA GPU that supports Reflex.
- If a game already has Reflex, enabling it in-game is usually the better option.
Which One Should You Use?
- For casual gaming → Async mode is fine.
- For the smoothest frame pacing → Try Front Edge or Back Edge Sync.
- For the lowest input lag → NVIDIA Reflex mode is the way to go.
It’s worth experimenting with these settings to see what works best for your setup.
Sources: Blur Busters Forums, Guru3D Forums