High Refresh Rate not working

[zak76]

hello
Dell S3222DGM HDMI works fine from 60Hz to 144Hz. But I can't get DisplayPort 60Hz to 165Hz.to work after OpenCore macOS Sonoma

Intel Core i5-10400F 6-Core 2.9GHz LGA1200
AMD Radeon RX 580 8 GB
16 GB 2666 MHz DDR4

 

[EliteMacx86]

hello
Dell S3222DGM HDMI works fine from 60Hz to 144Hz. But I can't get DisplayPort 60Hz to 165Hz.to work after OpenCore macOS Sonoma

Intel Core i5-10400F 6-Core 2.9GHz LGA1200
AMD Radeon RX 580 8 GB
16 GB 2666 MHz DDR4

Hello,

Are you using the DP cable which came with your monitor?

Have you tried different DP ports on the GPU?

 

[zak76]

hello
Dell S3222DGM works fine DisplayPort 60Hz to 165Hz windows 11 pro 64-bit
Linux Mint 21.3 Cinnamon Edition

macOS Sonoma 14.3 Black Screen dont output to DP. Black Screen.

 

[EliteMacx86]

hello
Dell S3222DGM works fine DisplayPort 60Hz to 165Hz windows 11 pro 64-bit
Linux Mint 21.3 Cinnamon Edition

macOS Sonoma 14.3 Black Screen dont output to DP. Black Screen.

What's the GPU brand?

 

[zak76]

hello which is a good video card
sapphire rx 580 pulse 8gb
Sapphire Radeon™ RX 6600 PULSE, 8GB

 

[EliteMacx86]

hello which is a good video card
sapphire rx 580 pulse 8gb
Sapphire Radeon™ RX 6600 PULSE, 8GB

RX 6600 for sure.

 

[zak76]

Hello​

Does macOS Sonoma support the Sapphire Radeon™ RX 6600 PULSE, 8GB​

 

[EliteMacx86]

Hello​

Does macOS Sonoma support the Sapphire Radeon™ RX 6600 PULSE, 8GB​

Yes, it does support.

 

[zak76]

Hello
macOS Sonoma 14.4 Black screen not outputting to DP. Black screen.

ASUS PRIME H470-PLUS, Socket 1200​

Sapphire Radeon™ RX 6600 PULSE, 8GB​

Intel® Core™ i5-10400 Comet Lake, 2.9GHz, 12MB, Socket 1200​

Dell 32 – S3222DGM​

 

[EliteMacx86]

Hello
macOS Sonoma 14.4 Black screen not outputting to DP. Black screen.

ASUS PRIME H470-PLUS, Socket 1200​

Sapphire Radeon™ RX 6600 PULSE, 8GB​

Intel® Core™ i5-10400 Comet Lake, 2.9GHz, 12MB, Socket 1200​

Dell 32 – S3222DGM​

Have you added agdpmod=pikera in the boot args?