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I am using a DisplayPort to USB-C for my monitor.
How can I get 120Hz ? Its only gives me 60Hz and its grayed out so I cant choose more then 60Hz.
Or am I only locked to get 60Hz ?
Thank you!
MacBook Pro 15″, macOS 11.1
The Apple specs for its laptops usually top out at 60Hz because you would need at minimum DisplayPort 1.3 to drive a 5K 5180x2880 at 60Hz, or DisplayPort 1.4 with Display Stream Compression (DSC) to drive a 5K display at full resolution faster than 60Hz. Without DSC, a 5K display would remain at a 60Hz refresh rate.
I believe Apple is still using DisplayPort 1.2, though they never reveal this in their specs, and that version would limit 5K to 5180x1440 @ 60 Hz. Should Apple Adopt HDMI 2.1, or DisplayPort 2.0 in future products, the 120 Hz refresh rates will be provided by those standards.
The Apple specs for its laptops usually top out at 60Hz because you would need at minimum DisplayPort 1.3 to drive a 5K 5180x2880 at 60Hz, or DisplayPort 1.4 with Display Stream Compression (DSC) to drive a 5K display at full resolution faster than 60Hz. Without DSC, a 5K display would remain at a 60Hz refresh rate.
I believe Apple is still using DisplayPort 1.2, though they never reveal this in their specs, and that version would limit 5K to 5180x1440 @ 60 Hz. Should Apple Adopt HDMI 2.1, or DisplayPort 2.0 in future products, the 120 Hz refresh rates will be provided by those standards.
There are a couple of 3rd party utilities that might help. SwitchResX and Resolutionator. Check either out
Paul
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