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Why does lower hz result in lower brightness when doing a vertical total tweak?

Posted: 19 May 2021, 12:52
by Jimbo
Hey all, I've been using these timings for awhile:

1920x1080@120hz
Front porch 24,3
Sync width 32,5
Total pixels 1984, 1500
Pixel clock: 357.12 mhz

I cant hit a consistent 120 fps in a certain game I play and would like to try 85 hz. However, when switching the hz to 85 with those timings, the screen is dark compared to 120 hz. I was wondering why this happens and if it's possible to get the brightness I had when I was using those timings with 120 hz.

Re: Why does lower hz result in lower brightness when doing a vertical total tweak?

Posted: 22 May 2021, 07:24
by elexor
If your using backlight strobing lower hz will be dimmer unless the strobe is brighter to compensate.
some monitors allow a strobe length adjustment you can use this to make it brighter at the cost of more motion blur.

higher hz = more strobes per seconds = brighter.