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Black level raise at FPS locks with VRR active on OLED monitors needs to be investigated

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This is something that I believe needs to be brought up in reviews more. For example let’s take my LG27GR95QE, 240hz output, VRR is active and the game I’m playing is running at 240FPS, but, if I cap the FPS to 60, then suddenly the black levels lift, and the image becomes tremendously washed, especially in low APL scenes. If I go back 240FPS, back levels become normal. Here I’m demonstrating this issue in the game Lies of P And here I’m demonstrating this right in the menu

This is a genuine problem in my opinion! There are many games are engine capped to 60, meaning such games will always have raised black levels while VRR is active. And sadly this happens even at 120FPS locks as well.

In reviews we are told that in order to avoid or to mitigate VRR flicker, the user should try to ensure stable FPS, typically in the form of a stable FPS lock, that’s all well and good, the flickering stops, but if the black levels are never corrected and are always statically lifted at said stable FPS lock, then we still have a problem now don’t we?

I’m interested in upgrading to a new WOLED monitor, but it’s difficult for me to research for one when almost no review takes into account image degradation that may or may not occur when playing games. Most users aren’t always going to be having 240FPS or 360FPS in their games, even on the most high end GPUs.

So what I want to know is how other WOLED monitors fare. I would love for this to be included in testing, is this issue still present in LG’s newer displays like the LG32GS95UE? Is the LG27GR95QE an outlier? Is it’s refreshed model any better? Do other brands like Asus etc fare better? If the issue is still there, how severe is it? I have a preference for WOLED as I prefer how WOLED looks in lit environments.

I made sure to test this on my LG CX and LG BX and found it to be very unnoticeable or rather imperceptible.

From what I know, the only way I am to mitigate this is by either disabling VRR, or dropping the overall max refresh rate (even at 120hz output the LG27GR95QE still fared worse than the CX in this regard). Neither of which are ideal compromises in my opinion, so this is something I intend to look out for when shopping for a new WOLED from now on.

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    Go with the Sony X750D. It has almost half of the input lag in 4k, this will definitely make gaming more fun. Also, the X750D is running the latest Android TV version (Marshmallow 6.0.1) which is more fast and feel better in general compare to the older Lollipop version.
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