Weird refresh rate M27Q

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Larzo
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Joined: 13 Jan 2019, 04:24

Weird refresh rate M27Q

Post by Larzo » 24 Sep 2021, 11:23

Hey, my new monitor can do 170hz.

I have set 169,831(max) in Windows and nvidia control panel, enabled G-SYNC Compatible + v-sync in nvidia control panel.
I have limited the game i want to play to 166FPS (i have read -3/-4 of max Hz is enough)

THE ISSUE: The monitor can show Refresh Rate in OSD and it jumps between 16X-170. It will show 170 (very briefly)even if i limit FPS to 140

Shouldnt this be 170 (or 169,831) Hz all the time ? Does it engange actual OG v-sync with extra input lag at 170?

I am really confused

Larzo
Posts: 4
Joined: 13 Jan 2019, 04:24

Re: Weird refresh rate M27Q

Post by Larzo » 17 Oct 2021, 15:04

Here is short video, FPS is locked in RTSS at 166fps. Monitor OSD shows the fluctuating numbers

https://streamable.com/juj6n2

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Discorz
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Location: Europe, Croatia
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Re: Weird refresh rate M27Q

Post by Discorz » 17 Oct 2021, 16:52

Seems to be working fine. As long as you don't see tearing you're good. OSD refresh rates are not perfectly accurate. You can even catch it at 188Hz.

Vsync locks fps to current refresh rate. Fps limiters bellow that value 'override it'. So it's actually fluctuating around 166fps. I'f you'd want it to be at 170 consistently you'd need to disable adaptive-sync and unlock the fps. In case with enabled vsync and fps > refresh rate you'd experience massive input lag.

Additionally I'd recommend to disable vsync or rtss and use only in-game limiters (assuming they're good).
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