I wanted to share this video because I don’t know much about applying this method
It is entirely possible that he is forcing 120hz to it but the monitor is not capable of actually displaying or dealing with it.
You can force whatever you like through the nvidia custom resolution and CRU (custom resolution utility) for AMD. The panels often can go higher, the scaler is usually the limiting factor. Either it will give an error on screen or go black as it can’t do anything with the signal it is getting.
When it does work it can be very difficult to find a “stable” framerate, they tend to get into to bad tearing or not actually running at the overclocked Hz. I notice he showed no testing at all of the 120hz working, blurbusters UFO test and other show up problems pretty quickly and is free and quick to do.
It is also almost definitely using colour compression (chroma 4:2:0 or 4:2:2), but i dont know if it supported full colour space to begin with. Stuff like HDR will be out as the bandwidth won’t support 4K, 120hz and HDR over HDMI.
The RTX cards also don’t support HDMI 2.1 so there is definitely something odd happening here.
Couple things to note. He is using a real HDMI 2.1 cable (I’ve ordered it for testing). Nvidia’s official answer is they don’t support it. It doesn’t mean that it won’t work. On the other hand it’s quiet possible some other trickery is happening. Chroma may be dropping some how. I know that if I was to set a custom resolution right now, the c9 will not let me do it above 60hz 4k. I have a suspicion that with the right cable it might.
Yeah you do definitely need the cable to be able to support it for sure, without that you are nowhere.
I would be interested to see if it actually washes out though. The TV supports it, the cable does, the GPU is certainly capable I wonder why the nVidia panel says no but windows say yes, that the odd part. So I wonder if it is just saying it does but not actually changing anything.
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