So, after trialling the BenQ PD3225U 4K monitor with my new Mac Studio M4 Max, I am comparing it with the PD3226G 4K. I have 2 immediate questions:
1) the monitor is 144Hz, so why can I only set it to 100Hz in Settings>Display?
2) HDR is not available unless I lower the frequency from 100Hz to 60Hz. Is this correct?
Thanks in advance.
[Re-Titled by Moderator]
Mac Studio, macOS 15.3
<< 1) the monitor is 144Hz, so why can I only set it to 100Hz in Settings>Display? >>
Because there is not enough bandwidth in a typical Thunderbolt cable to run any faster than what you are achieving.
<< 2) HDR is not available unless I lower the frequency from 100Hz to 60Hz. Is this correct? >>
Yes, because there is not enough bandwidth in a typical ThunderBolt cable to do that.
If you want the data rates you are asking about, the Thunderbolt cable has to 'gear-shift' from its current HBR3, about 26 G bits/secs up to the next step, UHBR10, which runs just shy of maximum outbound speed of 40 G bits/sec.
This is ONLY possible with Thunderbolt cables shorter than 0.5 meters, or with tuned ACTIVE cables that cost a lot more.
Thanks a lot for that. Seems logical - I think!
Sorry about late response, but I was on holiday for a week.
I am surprised that the monitor supports a higher refresh rate for 3840 x 2160 than for 1920 x 1080!
Yep, I don't know why they said that. It is showing 144Hz at 1920x1080.
Mac Studio M4 Max and BenQ PD3226G Display: HDR and Refresh Rate Limitations
