I'm considering buying the new Dell u3224 6K monitor, which has a resolution of 6144 x 3456.
My Macbook Pro 2019 16 inch has a slightly smaller resolution for attached monitors, 6016 x 3384.
Would this be a problem?
Just had the Dell u3224 6K delivered. Can't get above 30hz output on my MacBook Pro 2019.
Fine with Mac Studio (60Hz).
Using TB4 as connection. Tried different cables. Definitely can't get 60hz on the MBP.
these display speeds are running very close to the physical limit of the switching speeds of digital logic. fetching screen data at these rates does not need much processor intervention, but is still very intensive.
The Mac Studio uses a memory organization that is inherently faster and optimized for getting data out to the displays. ANY factor that makes even a small difference in the display data timing could make the difference between attaining 60 Hz and being limited to 30 Hz.
Maybe you already wrote it, but I missed whether you were able to get the display's maximum resolution in each case, or just the Mac's stated resolution in each case.
I’ve now discovered this has been reported elsewhere: https://forums.macrumors.com/threads/dell-6k-u3224kb-monitor.2387515/page-5?post=32165919#post-32165919
Clearly an issue on Apple’s side. Very disappointing.
The only problem I can foresee:
If it 'only' works at Apple's published maximum resolution, rather than the displays maximum resolution, Apple will not "fix" it.
I checked the Dell monitor’s manual, the MacBook’s resolution is listed as supported.
Since it is only ±2% I guess it is not scaled, instead a small portion of the screen is not used?
You may need USB-C or Thunderbolt cable shorter that 1 meter.
The one I’m using is less than a metre long
Perhaps try with HDMI or mDP connection?
According to documentation that should support 6K at 60Hz as well.
That would still need to be TB4 on the MBP end though. The mDP one that comes in the box is the same both ends.
I’ve tried two TB4 cables, both less than 1m. Neither allows over 30Hz
Some Dell displays may require you to use on-screen display settings to make some adjustments. An important one is the most advanced version of DisplayPort possible.
If I’m using TB4, why do I need to make adjustments to display port?
It's DisplayPort-over-ThunderBolt. Or put another way, DisplayPort tunnels through ThunderBolt to get to your Mac.
But it works as expected on the Mac Studio, so by deduction, I’m thinking the issue is a shortcoming/issue on the MBP side??
macbook pro 2019 and new dell u3224 6K monitor
