CAC-1335 1440p 240hz Flickering

Updated 1 day ago in R9 Fury Series

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skirbe 3 0 on 03-10-2025

I am connecting from my gpu a hdmi 2.1 to my monitor a display 1.4a, on 1440p 240hz my screen is flickering, when i lower the hz to even 120 it’s still flickering. Is this the right cable? or how can i fix this? (also sorry for posting under R9 fury series, selecting adapters and cables doesn’t let me post)

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Wiktor 0 0 on 16-10-2025

The adapter is able to do 1440p on 240Hz. Are you using Club-3d cable as well? What is your setup? GPU/Screen/Cable?

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martaorplq 0 0 on 09-03-2026

If your GPU is HDMI 2.1 and your monitor is DisplayPort 1.4a, the cable or adapter could definitely be the issue. HDMI-to-DisplayPort connections are not always simple passive cables; most require an active adapter, and many cheap ones can’t handle high bandwidth like 1440p at 240 Hz. Flickering is a common symptom of that limitation.

First, check if your monitor has a native DisplayPort input and use a proper DisplayPort cable directly from the GPU if possible. If you must convert HDMI to DP, make sure you’re using a high-quality active adapter rated for high refresh rates. Also try another cable, update GPU drivers, and disable adaptive sync temporarily to see if the flicker stops.

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Thunder26 0 0 1 day ago

can you describe which GPU you are using and what is the display been used? and can you make sure you have latest drivers installed? this adapter should support this resolution 1440p at 240Hz does not need very high bandwidth. Not a common limitation.