Monitor OC very weird issue

Hello guys, so I tried using 75hz since that’s what my monitor can do on Windows.
My monitor is a 16:10 1650x1080
I use KDE Plasma
On windows everything works fine when I just change the refresh rate to 75hz, but I had an issue here on Linux. Pixels were flying around and my monitor showed me an error message that its overscan. I thought its just an issue with xrandr and tried every single refresh rate until 60. Then I noticed something: even at 60, my custom mode has the same problem. So I went into the display settings and saw that it was reported as 1650x1080 55:36 instead of 16:10. Anyone know what the issue could be? I used this guide from github with the xrandr method since I have an rx470. If it helps, this is my modeline
I used the command cd ~/ && ./cvt12 1650 1080 75 -b and got

1650x1080 @ 75.000 Hz Reduced Blank (CVT) field rate 75.000 Hz; hsync: 83.925 kHz; pclk: 145.19 MHz

Modeline “1650x1080_75.00_rb2” 145.19 1650 1658 1690 1730 1080 1105 1113 1119 +hsync -vsync
Any help would be appreciated.

Just as advice, it is better to use it at 60hz and always leave those remaining 15kz so that the monitor feels more comfortable in its operation, only that.

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Hello @aqvyx
What does xrandr show?

Common resolutions for 16:10 aspect ratio

Standard Width Height
WXGA 1280 800
WXGA+ 1440 900
WSXGA+ 1680 1050
WUXGA 1920 1200
WQXGA 2560 1600
WQUXGA 3840 2400

Edit: 16:10 should be 1680x1050 Also, What is your output port? Hdmi, DVI, Display Port?

I think you can change it via xrandr.

Here is an example:

xrandr --output DP-0 --mode 1680x1050 --rate 75

In the above example:
DP-0 is the output port (Display Port-0)

Edit2: Caution! This is if your monitor supports it!


DVI-D-0 is my output, when I do xrandr --output DVI-D-0 --mode 1680x1050 --rate 75 nothing changes

well I now realized that I used the wrong res, but for some reason wtih 1680x1050 everything looks fine but my monitor itself still gives me an overscan error message and that I should change the resolution back

xrandr tells you the Hz your monitor supports for the resolutions. I would be going by that otherwise you risk damaging your monitor. I wouldn’t be concerned what it say’s in Windows. I doubt very much whether i could tell any difference. If the monitor supports it you should be able to set it to that.

I’ve been doing it since 4 years, I definitely feel the difference in geometry dash which is the game I play most

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Xrandr will show what your monitor will support. You should be able to set it if it’s supported. I may not have the settings command exactly the way it needs to be.