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Question: Why 5120x1440 Doesn't Work with Apple M1

Hi


Why the resolution 5120x1440 Doesn't work with the New Apple M1 ...


You indicate on the website '' One display with up to 6K resolution at 60Hz connected via Thunderbolt and one display with up to 4K resolution at 60Hz connected via HDMI 2.0 ''


But I can only use the resolution 3840 x 1080 not my native resolution 5120 x 1440.


Can I have a explication please ?


Thanks in advance


Mac mini 2018 or later

Posted on Nov 17, 2020 11:42 AM

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Nov 20, 2020 5:59 AM in response to Fyas In response to Fyas

I have a SAMSUNG 49” CRG9, which supports 5120 x 1440 @ 120hz. It works perfectly with on MacBook Air 2020. However, on the new Mac Mini M1 I had a hard time getting 5120x1440 @ 120hz. At first the M1 wouldn’t work with the DisplayPort to USB-C cable, even after updating to Big Sur 11.0.1. I assuming it’s because the usb-c cable I had only supports DP 1.3. The HDMI cable worked but not at 5120 x 1440.  


I ordered a Maxonar DisplayPort to USB-C cable from Amazon, which supports DP 1.4. I was able to connect the monitor with the new USB-C cable, however, max resolution I was able to get was 3840 x 1080 @ 60hz. I had to change the refresh rate setting on my monitor from 120hz to 60hz and turn off Freesync. That is when I was finally able to get 5120 x 1440 (low resolution). 


I am still having a problem where the system won’t detect the monitor when waking up from sleep. Currently, I have to unplug and replug the USB-C for the monitor to connect. It might just be a problem with the DisplayPort drivers or Big Sur. I am going to try order different DP 1.4 cables to see if that fixes the problem.


https://www.amazon.com/gp/product/B08B3XNZGS/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1


Nov 20, 2020 5:59 AM

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Nov 17, 2020 1:41 PM in response to Fyas In response to Fyas

5120 x 1440 is neither 4K, nor is it 6K. Every GPU has its best for display, and scaled resolutions, and the M1 GPU may simply not support that odd 5120 x 1440 resolution. Your best external resolution, presuming that your display supports it will be via a USB-C to DisplayPort 1.4 cable, or to a true 4K Display with good quality HDMI 2.0 or higher (e.g. Ultra-Speed HDMI 2.1 cables which are backward compatible with the HDMI 2.0 spec.

Nov 17, 2020 1:41 PM

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Nov 18, 2020 4:27 AM in response to Fyas In response to Fyas

Yeah, I forgot to mention ScreenResX, as I don't use it. The font size will be microscopic, and not certain you can have that screen resolution and larger fonts in menus, etc.


When my M1 mini arrives, I will be testing it with a 40 - 43 inch TV as a Desktop, so ScreenResX may play a role there too.

Nov 18, 2020 4:27 AM

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Nov 18, 2020 1:57 PM in response to Fyas In response to Fyas

What do you mean you can't scale? Is there no option or is it not working? Did you hold down the Opt key when you clicked on the Scale Resolution radio button to get the expanded list of resolutions to scale to?


I am awaiting delivery of a Mac Mini M1 and plan to connect it to a 5120x1440 ultrawide display as well. I hope I can make it work with a reasonably comfortable scale option. If not, I'll try doing a Picture-by-Picture setup with the HDMI and TB3 ports feeding the monitor and doing a side by side arrangement. It's not perfect but at least I'll be able to use the entire display as two monitors next to each other.

Nov 18, 2020 1:57 PM

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Question marked as Helpful

Nov 20, 2020 5:59 AM in response to Fyas In response to Fyas

I have a SAMSUNG 49” CRG9, which supports 5120 x 1440 @ 120hz. It works perfectly with on MacBook Air 2020. However, on the new Mac Mini M1 I had a hard time getting 5120x1440 @ 120hz. At first the M1 wouldn’t work with the DisplayPort to USB-C cable, even after updating to Big Sur 11.0.1. I assuming it’s because the usb-c cable I had only supports DP 1.3. The HDMI cable worked but not at 5120 x 1440.  


I ordered a Maxonar DisplayPort to USB-C cable from Amazon, which supports DP 1.4. I was able to connect the monitor with the new USB-C cable, however, max resolution I was able to get was 3840 x 1080 @ 60hz. I had to change the refresh rate setting on my monitor from 120hz to 60hz and turn off Freesync. That is when I was finally able to get 5120 x 1440 (low resolution). 


I am still having a problem where the system won’t detect the monitor when waking up from sleep. Currently, I have to unplug and replug the USB-C for the monitor to connect. It might just be a problem with the DisplayPort drivers or Big Sur. I am going to try order different DP 1.4 cables to see if that fixes the problem.


https://www.amazon.com/gp/product/B08B3XNZGS/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1


Nov 20, 2020 5:59 AM

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Question: Why 5120x1440 Doesn't Work with Apple M1