Triple 4k/120Hz on RTX 4090 - g-sync problem

Talk about NVIDIA G-SYNC, a variable refresh rate (VRR) technology. G-SYNC eliminates stutters, tearing, and reduces input lag. List of G-SYNC Monitors.
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Nielson
Posts: 1
Joined: 06 Jun 2023, 16:35

Triple 4k/120Hz on RTX 4090 - g-sync problem

Post by Nielson » 06 Jun 2023, 16:41

Dear experts,
maybe you can help me with my g-sync problem:

I use my new PC (7800X3D, ASUS B650e-f, MSI RTX 4090 Ventus, Win 11) with 3 identical LG OLED 4K/120Hz 48-inch TV screens (model C1 from 2021, with g-sync compatibility) and I want to have g-sync with all monitors of course.

G-sync works wonderfully on the HDMI output of the 4090 and HDMI 2.1 input of the monitor, in full 10-bit RGB, HDR.

However, g-sync is not recognized on the two screens that are connected to the display port output of the graphics card (with a monitor input also to HDMI 2.1).

Unfortunately, the "g-sync menu item" is missing in the Nvidia Control Panel and "Monitor Technology" does not appear under the global 3D settings. The monitors connected via DP work in "HDR RGB 10bit full" but with a FIXED 120Hz.

In my opinion it can't be the cable, I use one with DP1.4 -> HDMI 2.1 specification, see amazon: AGFINEST DisplayPort 1.4 to HDMI 2.1 8K cable.

I understand, the RTX 4090 supports 4K/120Hz and g-sync on all the display ports - but what am I doing wrong!?
Thanks for you help as I am lost.
Nielson

bumbeen
Posts: 84
Joined: 25 Apr 2023, 14:35

Re: Triple 4k/120Hz on RTX 4090 - g-sync problem

Post by bumbeen » 07 Jun 2023, 14:44

maybe you can use CRU tool to update the VRR range. seems like the cable doesn't convert the VRR range from HDMI to DP. I would be more surprised if it worked out of the box tbh!

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