G-Sync Compatible VRR range and LFC in LG 27GP850

Talk about NVIDIA G-SYNC, a variable refresh rate (VRR) technology. G-SYNC eliminates stutters, tearing, and reduces input lag. List of G-SYNC Monitors.
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combine54
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G-Sync Compatible VRR range and LFC in LG 27GP850

Post by combine54 » 31 Jan 2024, 12:39

Hi all,

I have LG 27GP850 monitor. VRR enabled in G-Sync Compatible mode for both Windowed and Full-screen applications, VRR range set to Extended mode, since I'm using built-in OC to 180Hz. V-Sync = Off. VRR overlay via monitor OSD and via plugin for RTSS.

While playing a 60FPS capped game (Elden Ring) and a CPU-heavy game (Guild Wars 2), I've noticed, that LFC kicks in way sooner than I expected it to - the moment FPS goes below 60. This behavior is confirmed by NVIDIA G-Sync certified list.

What bothers me so much, is why is this a problem with NV GPUs, but not an issue with AMD GPUs? Free-sync certified list states 48-165 via DP.
With 7900XTX, that I've borrowed from a friend, the monitor is able to go down to 53Hz before enabling LFC, which does seem much more reasonable and closer to advertised 48Hz hard cap for VRRmin.

Is there anything I can do to get the same behavior as on AMD GPU?

Thanks in advance and apologies if this has been answered before - my search queries didn't bring me to an answer.

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RealNC
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Re: G-Sync Compatible VRR range and LFC in LG 27GP850

Post by RealNC » 31 Jan 2024, 13:00

Does it matter? Meaning, do you see any stutter or anything?
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combine54
Posts: 2
Joined: 31 Jan 2024, 12:08

Re: G-Sync Compatible VRR range and LFC in LG 27GP850

Post by combine54 » 31 Jan 2024, 13:15

I think I've noticed some slight visual stutter, which is not present on RTSS frametime graph overlay, but I didn't do high FPS recordings yet to make a definite confirmation.
I also didn't do extensive visual testing on AMD GPU - since I only borrowed it for an hour to verify the VRR behavior in 48-60 range under the same conditions.

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