Can't use 170hz after gpu upgrade

Tyoma

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Mar 1, 2021
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24
Hey all!
I'm using Monterey 12.1 with 2 monitors:
Gigabyte m27q 170Hz and Dell P2418D 60Hz.
I was able to use the first monitor at 170hz with RX570 4GB without any problem, but yesterday I upgraded to Sapphire Pulse RX 6600 XT (with pikera boot args), and now if I choose any refresh rate above 60hz I get black screen.. any suggestions?

Screen Shot 2021-12-27 at 10.54.21.png

Edit
I can use 119.88Hz but nothing above..

Screen Shot 2021-12-27 at 11.07.57.png
 
Last edited:
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