[hannes69]

So you are saying users should use the video refresh rate in madVR and multiply this by the clock deviation to determine the frequency for custom resolutions. I was always aiming for 23.976.
Posted by ashlar - Today 19:19

Not your video refresh rate - you take the right multiple of the video frame rate in your setup.

Typical example:

projector, refresh rates of 40 Hz - 70 Hz can be played back. So the multiple is 2.

23.976fps movies: 47.952 Hz
24.000fps movies: 48.000 Hz
25.000fps movies: 50.000 Hz
29.970fps movies: 59,940 Hz

Now you want the given refresh rate multiplied with your clock deviation: E.g. 59.940 Hz * (1 + xxx %) (xxx = deviation, can be positive or negative)

Most GPUs struggle to lock-on to the 23.976 Hz refresh rate common to film and television. As a result, this is the refresh rate to focus on.

No. The GPU struggles to lock-on perfectly to ALL possible refresh rates. E.g. with normal resolutions you don´t get perfect 59.940 Hz but 59.930 - 59.950 Hz. The problem is there with all refresh rates. And how I formerly explained: You even don´t want these perfect values because of the clock deviation.

Under Refresh rate, enter 23 Hz. Now we want to manually tweak the timing values to change the VSync slightly. A pixel or two is all that is needed – any value too high or too low will result in a blank screen.

Enter a detailed refresh rate of 23.976 Hz.

What you enter depends on your hardware. Most of the hardware can´t handle low refresh rates like 23.976 Hz (the *1 multiplier of the framerate). There are TVs which can handle frequencies in the 120Hz region (so a *4 of the framerate), projectors usually need the *2 multiplier, many TFT monitors can ONLY display 59.94Hz with a given "normal" resolution and don´t accept custom resolutions!
That´s a kind of lottery with your hardware: it can probably accept custom resolutions or not, you have to try. You have to try out which setting your hardware accepts. Maybe you can alter horizontal front porch, maybe vertical back porch, maybe by +/- 1 maybe by +/- 10 ...

And why are you altering the ideal refresh rate rather than the reported display refresh rate? Doesn't the clock deviation define how far you are from the reported display clock not the ideal clock rate?

I hope I answered the question in my last post

you are trying to get the clock deviation as close to zero as possible that all the "magic"

Once again: NO. You CANNOT change the clock deviation. It may be zero by accident in one case, but normally it differs. Try it out: Make a custom resolution so your refresh rate changes. The number for the clock deviation in madvr is still the same...

and never forget using a custom resolution is kind of the same as overclocking you are running hardware outside of it's specs.
nothing should go wrong with small changes but this doesn't mean this is bulletproof. bigger changes can make huge problems!
people shouldn't be encouraged to blindly do this!

Your statement implies that you could damage your hardware or a custom resolution is something dangerous. Simply NO. You can get distorted image / colors or the image freezes or your screen goes black, but it´s not dangerous and nothing is damaged. If you create a custom resolution that your device can´t display and made it default by accident, simply do a safe boot and revert the custom resolution.
The comparison with overclocking is bad. We don´t try to get 600Hz refresh rate out of a 60Hz device