Hello Pittyh,

Thank you for your question. The answer is no i’m afraid, Adaptive sync at 1440p@120 will not work.

Ok thanks mate, hopefully the displayport 1.4 to hdmi 2.1 adapter you “may” or “may not” be working on will fix all the issues. 😛

Thanks.

VRR requires HDMI 2.1

Hi,

The option to use VRR is not possible with the cac-1080 due to lack of bandwith. 

slope rider is an intense reflex-based game that throws you into unpredictable slopes, falling ice, and sudden twists. Every run feels different, keeping you hooked with pure speed and adrenaline.

slope rider is an intense reflex-based game that throws you into unpredictable slopes, falling ice, and sudden twists. Every run feels different, keeping you hooked with pure speed and adrenaline.

When pushing a high-end GPU like the RTX 2080 Ti to deliver VRR (Variable Refresh Rate) at 1440p120Hz on an LG C9, users often encounter bandwidth and compatibility limits over HDMI. While HDMI 2.1 supports high refresh rates and VRR, it’s important to ensure both the monitor firmware and GPU drivers are fully updated. Tweaking settings in the graphics control panel, like enabling G-SYNC Compatible mode, can also help stabilize performance.

Interestingly, this kind of fine-tuning in hardware is not unlike optimizing performance in precision games. For example, in Slice Master, players must adjust timing, reflexes, and strategy to master each level. Just as VRR smooths frame rates for the best visual experience, Slice Master rewards careful calibration and skill improvement:

That’s a tricky setup! While the CAC-1080 might work for 1440p@120Hz with adaptive sync, your best bet for guaranteed performance is exploring DisplayPort options with your 2080 Ti. For a different kind of smooth experience, have you ever checked out Basketball Stars? It’s surprisingly addictive and a great way to unwind after tinkering with tech! Just a thought.

Setting up the CAC-1080 to bridge the gap between DisplayPort and HDMI 2.1 is a classic challenge for RTX 20-series owners looking for that smooth VRR experience on an LG C9. Achieving stable 1440p@120Hz requires a perfect balance of bandwidth and cable quality. Once you finally get those settings locked in and your refresh rates synced, there’s no better way to test your new, lag-free setup than with a game that demands high precision. I’ve found that playing Slice Master is an excellent way to enjoy that newfound smoothness. It’s a very satisfying video game that relies heavily on timing and sharp reflexes—exactly the kind of performance you want to showcase on a 120Hz OLED screen. It’s a great, quick way to decompress while appreciating your optimized hardware setup. Best of luck with the configuration!