Question Is it laggy when your monitors are on different refresh rates?

Oct 22, 2022
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I use two monitors, both 4k, but one is 144hz, the other is 60hz.
CPU is AMD 5900x, GPU is AMD 6800xt.

When they are both on, watching high quality online videos, like on Youtube, is laggy as hell... Both of them are laggy.

When one of them is off, or they are both on 60hz, problem solved...

Not sure in which hardware the issue lies, GPU or CPU...

I wonder if anyone has this issue too, especially among Intel and Nvidia users, because I suspect this is an AMD-only problem...

Thanks!
 

Aeacus

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Ambassador
It is not only AMD (Radeon) issue, but with all GPUs where you use different refresh rate monitors.
Found some interesting reading, with fixes,
link 01: https://www.reddit.com/r/pcmasterrace/comments/7h9bnu View: https://www.reddit.com/r/pcmasterrace/comments/7h9bnu/psafor_people_with_dual_monitors_with_different/

link 02: https://www.bluecinetech.co.uk/multiple-monitors-with-different-refresh-rates/

Bottom line is, GPU isn't able to output different refresh rates to different monitors at the same time. Hence the lag/stutter.

Analog example would be if you'd have a vehicle with diff lock on axle, whereby both wheels will turn at same RPM. But one wheel is 17" and another is 22". Whereby 22" will travel further than 17" wheel, thus forcing the vehicle to turn towards the smaller wheel, while what you want, is to drive straight. Can't be done, unless both wheels are same size (or both monitors have same refresh rate).
 
Oct 22, 2022
6
1
15
0
It is not only AMD (Radeon) issue, but with all GPUs where you use different refresh rate monitors.
Found some interesting reading, with fixes,
link 01: https://www.reddit.com/r/pcmasterrace/comments/7h9bnu View: https://www.reddit.com/r/pcmasterrace/comments/7h9bnu/psafor_people_with_dual_monitors_with_different/

link 02: https://www.bluecinetech.co.uk/multiple-monitors-with-different-refresh-rates/

Bottom line is, GPU isn't able to output different refresh rates to different monitors at the same time. Hence the lag/stutter.

Analog example would be if you'd have a vehicle with diff lock on axle, whereby both wheels will turn at same RPM. But one wheel is 17" and another is 22". Whereby 22" will travel further than 17" wheel, thus forcing the vehicle to turn towards the smaller wheel, while what you want, is to drive straight. Can't be done, unless both wheels are same size (or both monitors have same refresh rate).
Thanks so much!

It seems that.. it is just a bug in Chrome.

After I switched to Firefox, the problem no longer exists. I never thought about this possibility before your reply.

The steps for "Window Insider program" and "GPU scaling" are unnecessary for me.
 
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