4K 144Hz over USB-C from MacBook Pro?

DP 1.2 is capable of 4K at up to 75 Hz. Certainly at least at 60 Hz that I get with my Dell P2415Q with GTX 650 Ti Boost since 2015.

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Yeah this is also what I’ve found so far while researching DisplayPort 1.2 capabilities. Definitely should cope with 4K60Hz so I’m not sure why the 13" MBP is locked at 30Hz.

Not a Macbook user, but I am using a 10Gbps-rated USB-C cable on Linux and having the same issue.

Still waiting for my Eve Type-C cable to arrive and hoping it will resolve this. IF not, I am going to have to dig further.

I’m not able to get any video via USB-C from an M1 MacBook Air or Intel iMac. Has anyone else had this issue? I posted more details here: Unable to get video from an M1 MacBook Air or Intel iMac via USB-C - #2 by good4y0u

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You may check out this.
https://hypershop.zendesk.com/hc/en-us/articles/360045124231-Why-can-t-I-get-4K60Hz-

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Thanks. Potentially useful info for the Eve team in terms of fixing the 30-Hz issue.

DP 1.2 signal has a total of 4 Lanes, each lane supports 5.4Gbps. With a total of 4 lanes, it supports 4K 60Hz video, while with 2 lanes, it can only support up to 4K 30Hz.

DP 1.4 signal also has a total of 4 lanes, each lane is capable of running 8.1Gbps. It supports 8K with a total of 4 lanes, while with 2 lanes, it can support 4K 60Hz.

My Dell P2415Q (that I get 4K@60Hz with via DP with no problem) is probably capable of using all the four lanes of DP 1.2.

Eve Spectrum (that I get just 4K@30Hz with via DP) is probably currently only capable of using just two lanes of the four DP 1.2 lanes.

That said, it’s not quite clear how this may affect the case with using a DP-to-HDMI-2.0 adapter where I still get the same 30 Hz though the monitor is connected via HDMI instead of DP in that case.

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My Surface Pro 4 which uses DP 1.2 does 4k60 on the prototype Spectrum.

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So, that Eve Spectrum works at 4K@60Hz with Surface Pro 4 via DP 1.2, is probably another confirmation that the 30-Hz issue is not related to a limited number of used DP lanes.

Other confirmations:

  • I have the same issue with a DP-to-HDMI-2.0 adapter where DP limitations should not apply.

  • I was also able to make Spectrum work at 4K@60Hz via daisy-chaining output of my Dell P2415Q (2015) which is most likely also DP 1.2 — at least that’s the DP version mentioned in the Dell P2415Q manual in terms of the daisy-chaining/MST feature.

So either DP lanes have nothing to do with the 30-Hz issue, or, less likely, the issue has multiple different reasons that affect different cases. For example, 30 Hz via DP and/or USB-C might be caused by a limited number of DP lanes used in some cases due to some backward incompatibility in the Eve Spectrum’s DP implementation, while 30 Hz via HDMI 2.x might be caused by something else.

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I tried the monitor with two Mac with a single USB-C cable (USB4 rated for 40Gbps).
Both with macOS Big Sur 11.5.1

MacBookPro15,1 from 2018 (Intel UHD Graphics 630 + Radeon Pro 555X)

  • It works at 4K@60Hz
  • I can enable wide colors / HDR, but there is a high pitch (from the monitor, so I’ll stay in SDR there)
  • Charge power 100W

MacBookAir10,1 from 2020 (M1, 8/8 cores)

  • It works at 4K@144Hz
  • I cannot enable wide colors / HDR
  • Charge power 100W (way higher than the default charger)

Either way the monitor preference window doesn’t allow me to change the resolution nor the refresh rate. Not sure if it’s normal or not, but I wouldn’t want to lower any of them anyway.

Other notes:

  • As read before: the (charge) cable that comes with the Mac doesn’t work for display
  • I tried some other USB-C cables like phones: not working either (even tried a 10Gbps cable, not enough)
  • You do have to use a good cable
  • I should be able, in a few days (in transit), to try a Thunderbolt 4 (TB4) cable too. I imagine it will work like my USB4 since it cross-compatible (not like some TB3).
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I have a thunderbolt to HDMI/USB C and B. In my case I’m using an iMac Big Sur. The Eve monitor doesn’t pick up the signal, well. The Mac sees it and then it stops and locks. I’ve tried hdmi and usb c and nothing. Is there a guide in here for optimal settings? Or should I just parse this thread for settings

Hello,

this is what I found from Google, please guys confirm :

You have a M1 Mac with Big Sur OR You have a Intel Mac with Catalina

  • You can use your Eve Spectrum with Mac OS up to 4K@144Hz if you are using a USB-C to DP 1.4 cable (minimum 32,4Gbps).
    ->Clamshell mode : working if you plug your Mac with power on another USB-C input.

  • If you’re using a USB-C to USB-C thunderbolt 3 cable (don’t use the charging USB-C cable that comes with your Mac), you will only have 4K@60Hz.
    ->Clamshell mode : working, you do not have to use another cable.

You have a Intel Mac with Big Sur?
->The following 2 cases are confirmed by @tureki in his post.

  • You can use your Eve Spectrum with Mac OS up to 4K@60Hz if you are using a USB-C to DP 1.4 cable (minimum 32,4Gbps).
    ->Clamshell mode : working, if you plug your Mac with power on another USB-C input.

  • If you’re using a USB-C to USB-C thunderbolt 3 cable (don’t use the charging USB-C cable that comes with your Mac), you will only have 4K@60Hz.
    ->Clamshell mode : working, you do not have to use another cable.

->Why there is no 4K@144Hz on Mac OS Big Sur ?
DSC is broken since Big Sure update, as NZgeek said:

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I wonder if the MBP is hard-coded to assume that the USB link is always in USB 3.0 mode. That obviously limits the maximum refresh rate, and would be why converting it to a pure DP signal would allow 144Hz to be used.

I’ll try to compare it to what Windows supports with the same cable. I’ve got an RTX2070 with a USB-C port on it, which should be DP1.4 + DSC compatible. It’ll be interesting to see if Windows will let me do 4K@144Hz (with or without HDR) or if I’m limited to 60Hz there too.

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Several people with M1 macs in this thread are getting 4k/144 over USB-C.

This thread has gotten me worried… I have a MacBook Pro 16 2019 with AMD Radeon Pro 5300M 4 GB and 16GB Ram. I’ve pre-ordered Eve Spectrum 4k hoping I could use at least 120Hz on MacOS. I dont game but would love the high refresh rate. I am now thinking if I have issues with this monitor running high refresh rate on MacOS, maybe I should cancel my ore-order and ask for a refund…

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The issue doesn’t appear to be limited to just the Spectrum. From the research I’ve done, it appears to be a general issue across any high refresh rate displays.

It appears that using a USB-C to DP cable will allow you to get the high refresh rates you expect. However, that does mean that you won’t get a single cable connection between your MBP and the Spectrum.

So is it possible to run at 4K@120Hz and use peripherals connected to the Spectrum (webcam?) with a USB C to DisplayPort cable?

From what I understand the only restriction is that Spectrum won’t be able to charge the Mac through its DisplayPort?

If that’s correct can anyone recommend a good usb c to DisplayPort cable? I’m using a M1 Mac Mini so it would be the perfect set up for me as I don’t care about charging

Thanks @NZgeek I dont care about a single cable, I am after a high resolution and refresh rate.

I am going to wait for my Eve Spectrum 4k to arrive (hopefully in Sept) and I will get the following cable:

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I’m able to get 4K, HDR and 144Hz on my M1 MacMini. It works by using a normal Displayport 1.4 to USB C cable.
Sadly the M1 Macs only support one monitor using this high refresh rate. A second monitor can only be connected by HDMI which delivers 4K, HDR but “only” 60Hz…

I hope Apple fixes that with their next Gen silicon…

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@LeoT Awesome, thank ou for confirming re M1 and 4K, HDR and 144Hz on your M1 MacMini :slight_smile:

I’ve got a MacBook Pro 16 2019 with AMD Radeon Pro 5300M 4 GB and 16GB Ram and hopefully it will also work for me, hopefully Apple hasn’t screwed anything on non M1 devices. It would be great if anyone with Intel based Mac could confirm if they are able toget a 4K, HDR and 144Hz or 120Hz.

Only 4K 60Hz for me using a USB-C to DP 1.4 cable. My partner’s windows laptop is able to achieve 4k 120Hz with HDR while using the same cable. Definitely seems to be a Mac OS issue.