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joevt

macrumors 604
Jun 21, 2012
6,974
4,262
Hey guys, I'm struggling with the Dell u2723qe.

I'm trying to connect a second display via daisy chain to the monitor, but the second monitor only runs at 30 hz.

When I set the Dell Monitor for higher resolution and not faster data transfer it just loses the connection completely and says that there is no usb-c connection.
The port on the Laptop is Thunderbolt 3 so I should be able to get both of the displays on 4K 60 hz right?
Dell does not make Thunderbolt displays. The Dell u2723qe is not a Thunderbolt display. It does not use Thunderbolt for display chaining. It uses MST. macOS doesn't support MST for multiple displays. You are probably using a PC laptop with Windows.

What PC laptop and GPU?
 
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chekie

macrumors member
Sep 11, 2013
93
63
Hey guys, I'm struggling with the Dell u2723qe.

I'm trying to connect a second display via daisy chain to the monitor, but the second monitor only runs at 30 hz.

When I set the Dell Monitor for higher resolution and not faster data transfer it just loses the connection completely and says that there is no usb-c connection.
The port on the Laptop is Thunderbolt 3 so I should be able to get both of the displays on 4K 60 hz right?
Thunderbolt is not strictly required for daisy chaining. I think you'll need a displayport (over USB C or not) that supports DP 1.4 with DSC. And it only works for windows system.
 

robotica

macrumors 65816
Jul 10, 2007
1,256
1,412
Edinburgh
I just got a couple of P27u-20's in which some might find up to scratch. Thunderbolt 4 with 99.1 DCI P3. They seem to go on sale quite often. I got mine for £470 each. Still playing with them but so far so good :)

 

Jimmdean

macrumors 6502a
Mar 21, 2007
648
647
I just got a couple of P27u-20's in which some might find up to scratch. Thunderbolt 4 with 99.1 DCI P3. They seem to go on sale quite often. I got mine for £470 each. Still playing with them but so far so good :)


Are you able to daisy chain these (via TB) with your mac? (and if so what is your mac?)
 
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fuchai

macrumors newbie
Jul 18, 2022
5
1

U2723QE/U3223QE Scaling and 'Fuzziness' Issues??​


Will you have this problem "displays to fully scalable screens"?
HiDPI (High Dots Per Inch) can be said to be the necessary display technology for all of Apple's mainstream MacBook, MacBook Pro and iMac screens. The Apple screen can make the font display so clearly, the main thing is to rely on HiDPI software rendering technology to achieve, double the pixels in a normal dimension. HiDPI results in more detailed shapes and better anti-aliasing

Do you have any users to share the use of "BetterDisplay" to solve scaling and fuzziness issues??
 

robotica

macrumors 65816
Jul 10, 2007
1,256
1,412
Edinburgh
Are you able to daisy chain these (via TB) with your mac? (and if so what is your mac?)
Yeah, I connect them both through one Thunderbolt 4 port. I am using a Macbook Pro with M1 Pro (10 core CPU/16 GPU version)

Plus, I have my computer wired up through the display ports and still leaves me both the HDMI ports free :) I am pretty happy with the functionality and connection. One cable connection is great for the Macbook and my work Laptop.
 

Jimmdean

macrumors 6502a
Mar 21, 2007
648
647
Yeah, I connect them both through one Thunderbolt 4 port. I am using a Macbook Pro with M1 Pro (10 core CPU/16 GPU version)

Plus, I have my computer wired up through the display ports and still leaves me both the HDMI ports free :) I am pretty happy with the functionality and connection. One cable connection is great for the Macbook and my work Laptop.

Same here. Yeah the daisy-chaining with Macs is usually one of the areas where these 3rd-party options falter. Good to hear that's not the case here. How about scaling and crispness? I'm coming from a 27" retina iMac - I know a lot of people have issues with that as well.
 
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robotica

macrumors 65816
Jul 10, 2007
1,256
1,412
Edinburgh
Same here. Yeah the daisy-chaining with Macs is usually one of the areas where these 3rd-party options falter. Good to hear that's not the case here. How about scaling and crispness? I'm coming from a 27" retina iMac - I know a lot of people have issues with that as well.
With thunderbolt 4 to get that certification you need to be able to drive 2 4k monitos at 60hz so as long as your device is thunderbolt 4 you should be good to go. (I think thunderbolt 3 for intel macs were always setup like this) Which is the reason I think the new Macbook Air/13 Pro is only thunderbolt 3 due to the single monitor limitation.


Scaling is good, Mac OS wants to scale it to 1080p though, but I am using the app better display to scale them to 1440p and its very sharp. No issues there :) It’s hard to get opinions on these monitors though. For some reason they seem to have flown well under the radar despite the amazing specs(TB4, DCI P3, 100% Adobe RGB, built in RG45 etc) on them.
 
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Jimmdean

macrumors 6502a
Mar 21, 2007
648
647
With thunderbolt 4 to get that certification you need to be able to drive 2 4k monitos at 60hz so as long as your device is thunderbolt 4 you should be good to go. (I think thunderbolt 3 for intel macs were always setup like this) Which is the reason I think the new Macbook Air/13 Pro is only thunderbolt 3 due to the single monitor limitation.


Scaling is good, Mac OS wants to scale it to 1080p though, but I am using the app better display to scale them to 1440p and its very sharp. No issues there :) It’s hard to get opinions on these monitors though. For some reason they seem to have flown well under the radar despite the amazing specs(TB4, DCI P3, 100% Adobe RGB, built in RG45 etc) on them.

Another thing I can't tell from the user guide is exactly how the ethernet works - is it on all-the time to both the TB4 and USB-B connected devices? or does it follow the KVM selection? and if it does follow the KVM is it one of the ports you can bind to one or the other so it doesn't follow? thx
 

robotica

macrumors 65816
Jul 10, 2007
1,256
1,412
Edinburgh
So the manual is a total disaster haha. There is an app on the windows side which is much better for setting things up and explaining how things work (not available on mac sadly). I don't use the KVM and just use a bluetooth keyboard and mouse which both have 3 device switching so don't have any experience with that side of things. When I was looking at the manual about the KVM, well I will be honest, it didn't make sense to me. I guess it’s one of those things you need to try for yourself to understand. As for the ethernet I think it’s just for the thunderbolt 4 devices only, I have it connected and it picks it up on my mac and work laptop. For my computer I already have it hardwired separably so don't use the USB-A hub on it.
 

robotica

macrumors 65816
Jul 10, 2007
1,256
1,412
Edinburgh
Another thing I can't tell from the user guide is exactly how the ethernet works - is it on all-the time to both the TB4 and USB-B connected devices? or does it follow the KVM selection? and if it does follow the KVM is it one of the ports you can bind to one or the other so it doesn't follow? thx
Actually re reading the manual, I think the network is shared between the 2 systems.
 

Degrader

macrumors member
Feb 19, 2022
61
24
Another thing I can't tell from the user guide is exactly how the ethernet works - is it on all-the time to both the TB4 and USB-B connected devices? or does it follow the KVM selection? and if it does follow the KVM is it one of the ports you can bind to one or the other so it doesn't follow? thx
No, it isn't unfortunately. While I didn't use the ethernet port, I've read a reply from Chris (a Dell manager) at the Dell forums that the ethernet port also switches to the active computer when using the KVM switch. So it is not possible for instance to download a file on one computer while working on the other.
 
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Dentifrice

macrumors 6502
Aug 27, 2008
448
85
No, it isn't unfortunately. While I didn't use the ethernet port, I've read a reply from Chris (a Dell manager) at the Dell forums that the ethernet port also switches to the active computer when using the KVM switch. So it is not possible for instance to download a file on one computer while working on the other.
exactly. the etherport is useless. I use the KVM for everything else (mouse, keyboard, usb speakers, webcam, etc.) but not the etherport
 

joevt

macrumors 604
Jun 21, 2012
6,974
4,262
exactly. the etherport is useless. I use the KVM for everything else (mouse, keyboard, usb speakers, webcam, etc.) but not the etherport
It seems that what Dell did is something like this:
1) One USB hub for everything.
2) One USB Ethernet Adapter for the display's Ethernet connection.

A proper KVM implementation with Ethernet would have the following:
1) Two USB hubs that are always connected upstream each to a different computer.
2) A USB Ethernet adapter for each hub.
3) A Ethernet switch with two ports for those USB Ethernet adapters to connect to and an upstream port for the display's Ethernet connection.
4) A third USB hub that switches connection between the first two USB hubs. This hub is where the mouse, keyboard, and other USB ports are connected.

The two USB hubs that are always connected to a computer could have additional ports for devices that you don't want to switch between computers - such as for external storage devices which you would not like to be unceremoniously disconnected every time you need to switch the keyboard/video/mouse (KVM) between computers.
 
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Jimmdean

macrumors 6502a
Mar 21, 2007
648
647
No, it isn't unfortunately. While I didn't use the ethernet port, I've read a reply from Chris (a Dell manager) at the Dell forums that the ethernet port also switches to the active computer when using the KVM switch. So it is not possible for instance to download a file on one computer while working on the other.

@robotica and myself were discussing the P27u-20 (Lenovo), not the Dell model. I'm assuming you were actually referencing the Dell monitor, which I'm sure if fine otherwise, but is not a Thunderbolt monitor like the Lenovo. Sorry for the confusion...

The Lenovo behavior may be the same - we're not quite sure yet.
 
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Degrader

macrumors member
Feb 19, 2022
61
24
@robotica and myself were discussing the P27u-20 (Lenovo), not the Dell model. I'm assuming you were actually referencing the Dell monitor, which I'm sure if fine otherwise, but is not a Thunderbolt monitor like the Lenovo. Sorry for the confusion...

The Lenovo behavior may be the same - we're not quite sure yet.
Ah, I see, sorry.
 

SpotOnT

macrumors 65816
Dec 7, 2016
1,037
2,218
Quick question: has anyone found a working solution to get 4k 60hz from this monitor using a Mac with Displayport 1.2?

If not, is Displayport 1.2 support something Dell could add with a firmware update, or would it be a hardware limitation?
 

vddobrev

macrumors 6502a
Oct 28, 2016
962
833
Haskovo, Bulgaria
Quick question: has anyone found a working solution to get 4k 60hz from this monitor using a Mac with Displayport 1.2?

If not, is Displayport 1.2 support something Dell could add with a firmware update, or would it be a hardware limitation?
My MacPro 2013 with D700 is able to output 4K@60Hz over miniDP to DP cable.
 
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5425642

Cancelled
Jan 19, 2019
983
554
@Jimmdean bro, now I’m thinking of buying two P27u-20 instead of a second dell. I already have one and I need one more but now I’m starting to eye the p27u-20 but the contrast is only 1000:1 and the dell one is 2000:1
 

SpotOnT

macrumors 65816
Dec 7, 2016
1,037
2,218
My MacPro 2013 with D700 is able to output 4K@60Hz over miniDP to DP cable.

Thank you for the response. Just to confirm, you are getting full “4k” with 60hz on the Dell U2723QE with your 2013 Mac Pro?

Sorry if I am being dense. Back around page 14 people were experiencing issues that the U2723QE seemed to require a two-lane DisplayPort 1.4 HBR3 connection for "4K" at 60 Hz and couldn’t do "4K" at 60 Hz via four-lane DisplayPort 1.2 HBR2. It wasn’t clear to me if this was a macOS bug that eventually got resolved or a driver/firmware issue or what. But if it works at 60hz over DisplayPort with the 2013 Mac Pro, that is excellent news!
 
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vddobrev

macrumors 6502a
Oct 28, 2016
962
833
Haskovo, Bulgaria
Thank you for the response. Just to confirm, you are getting full “4k” with 60hz on the Dell U2723QE with your 2013 Mac Pro?

Sorry if I am being dense. Back around page 14 people were experiencing issues that the U2723QE seemed to require a two-lane DisplayPort 1.4 HBR3 connection for "4K" at 60 Hz and couldn’t do "4K" at 60 Hz via four-lane DisplayPort 1.2 HBR2. It wasn’t clear to me if this was a macOS bug that eventually got resolved or a driver/firmware issue or what. But if it works at 60hz over DisplayPort with the 2013 Mac Pro, that is excellent news!

Yes, full 4K@60Hz on the U3223QE.


 

joevt

macrumors 604
Jun 21, 2012
6,974
4,262
Thank you for the response. Just to confirm, you are getting full “4k” with 60hz on the Dell U2723QE with your 2013 Mac Pro?

Sorry if I am being dense. Back around page 14 people were experiencing issues that the U2723QE seemed to require a two-lane DisplayPort 1.4 HBR3 connection for "4K" at 60 Hz and couldn’t do "4K" at 60 Hz via four-lane DisplayPort 1.2 HBR2. It wasn’t clear to me if this was a macOS bug that eventually got resolved or a driver/firmware issue or what. But if it works at 60hz over DisplayPort with the 2013 Mac Pro, that is excellent news!
On page 36 there's more info. I think the solution is to disable MST when connecting to a Mac and make sure prioritize resolution is selected instead of prioritize data.
#890
 
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5425642

Cancelled
Jan 19, 2019
983
554
What usb-c cable should I buy is I want a longer one? 2 meter or similar the one that follows with the display is kind of short
 
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