UP3218K only runs at 4k

[dreamxstudio]

You're the ******* goat mate, I've had problems for a year. You just solved the power-cycle hassle and the mouse pointer bug.
Which benchmark would you like me to run? I don't see any performance downgrade with 10.13.3, but obviously just ask and I'll do

Very simple, 1) is there any frames drop when u open folder inside launchpad 2) is there any laggy experience when u drag finder Window around.

I switched from 1080Ti to RX580 so the system UI's rendering is very smooth.
Webdriver is less good than AMD radeon cards. I just wanna confirm if the lag only happens on X99 platform or, Webdriver's sake.

 

[dreamxstudio]

Has anyone had any luck with 8K in macOS 10.13.3? Im thinking of getting the Dell UP3218K to use with gtx 1080 but can't find any information about macOS supporting 8k res anywhere.

I now run perfectly with 2715K both 1080Ti & RX580 under OSX10.13, no cursor glitch, no powercycle.
3218K was only tested with 1080Ti under OSX10.12/13, so I strongly recommend u try it with RX580, because 8K is not working with webdriver.

 

[nunziantimo]

Very simple, 1) is there any frames drop when u open folder inside launchpad 2) is there any laggy experience when u drag finder Window around.

I switched from 1080Ti to RX580 so the system UI's rendering is very smooth.
Webdriver is less good than AMD radeon cards. I just wanna confirm if the lag only happens on X99 platform or, Webdriver's sake.

No dude on 10.13.3 I have trash performances with the web drivers. I just reverted to the older web drivers (.104) and now I have zero problems. I used a German app to patch the older drivers to work on the latest build.

So it's an issue related to the webs and not your platform. If you check the thread here you'll see basically everyone complaining.

 

[joetazz]

I now run perfectly with 2715K both 1080Ti & RX580 under OSX10.13, no cursor glitch, no powercycle.
3218K was only tested with 1080Ti under OSX10.12/13, so I strongly recommend u try it with RX580, because 8K is not working with webdriver.

Thanks, yeah I have no luck with 8k on the Dell UP3218K with GTX 1080. Runs as two separate displays with dual DP. Or 4k with one DP, which even seems a bit blurry and not as sharp as it should be, maybe I need to experiment with switchresx or do you think it is a Nvidia driver issue?

 

[dreamxstudio]

Thanks, yeah I have no luck with 8k on the Dell UP3218K with GTX 1080. Runs as two separate displays with dual DP. Or 4k with one DP, which even seems a bit blurry and not as sharp as it should be, maybe I need to experiment with switchresx or do you think it is a Nvidia driver issue?

Very likely, u can try it with AMD cards, like vega or rx580.
As for switchRes, not working actually.

 

[joetazz]

Very likely, u can try it with AMD cards, like vega or rx580.
As for switchRes, not working actually.

A little update on this - I installed an RX 580 as I updated to Mojave (10.14.3). The Dell UP3218k still doesn't seem to run at 8K. System report is showing the max resolution as 6720 x 3780. Using single Displayport 1.4, 32.4gbps cable.

Could this be an OS limitation that it can't reach 7680 x 4320 / 8k?

 

[joevt]

A little update on this - I installed an RX 580 as I updated to Mojave (10.14.3). The Dell UP3218k still doesn't seem to run at 8K. System report is showing the max resolution as 6720 x 3780. Using single Displayport 1.4, 32.4gbps cable.

Could this be an OS limitation that it can't reach 7680 x 4320 / 8k?

With only one cable, only 7680x4320@30Hz will be possible without DSC (Display Stream Compression) which the UP3218k does not support. Maybe the drivers don't support it either? Use SwitchResX to create a custom resolution if that timing doesn't exist. Use SwitchResX to show us the timing information of the 6720x3780@60Hz resolution.

 

[joetazz]

With only one cable, only 7680x4320@30Hz will be possible without DSC (Display Stream Compression) which the UP3218k does not support. Maybe the drivers don't support it either? Use SwitchResX to create a custom resolution if that timing doesn't exist. Use SwitchResX to show us the timing information of the 6720x3780@60Hz resolution.

Hi, attached below EDID info exported from switch res x. I have two DP 1.4 cables now to connect the monitor to RX580, however it shows as two separate screens in Mojave.

I've installed switch res X so can play with that but I'm not really sure which settings im looking for. Should I be trying to tile both displays/ports, or just set a custom resolution using a single cable?

Any insight into what settings I should try would be greatly appricieated.

Thanks


EDIT - Managed to get 7680x4320 @ 30Hz working with switch res x (scaled to 3840 x 2160) looks amazing! However cursor feels very slow compared to 60Hz and makes work feel a lot slower. Next to see if possible to reach 60Hz using two cables somehow.

 

[joevt]

Hi, attached below EDID info exported from switch res x. I have two DP 1.4 cables now to connect the monitor to RX580, however it shows as two separate screens in Mojave.

I've installed switch res X so can play with that but I'm not really sure which settings im looking for. Should I be trying to tile both displays/ports, or just set a custom resolution using a single cable?

Any insight into what settings I should try would be greatly appricieated.

Thanks


EDIT - Managed to get 7680x4320 @ 30Hz working with switch res x (scaled to 3840 x 2160) looks amazing! However cursor feels very slow compared to 60Hz and makes work feel a lot slower. Next to see if possible to reach 60Hz using two cables somehow.

Doubled click the 7680x4320 @ 30Hz resolution (and/or the 3840x2160 30Hz HiDPI resolution) in the "Current Resolutions" list in SwitchRes X to show the timing information. Do the same for the 6720x3780@60Hz resolution.

You only included one EDID. If it shows as two screens, then you should be able to get an EDID from both.

There's a folder at /System/Library/Displays/Contents/Resources/Overrides/DisplayVendorID-10ac containing information for Dell displays (10ac is the vendor ID which encodes the three letter code of "DEL"). In that folder is a file "DisplayProductID-40b6.mtdd" describing the Dell 5K display (40b6 is the product ID). Maybe try creating a similar file "DisplayProductID-4147.mtdd" for the Dell 8K display (modify the fields to match the 8K display). The overlay part is probably an EDID which will probably need to be modified as well.

Restart after each change to the Overrides folder.

Maybe remove the existing "DisplayProductID-4147" file. The file modifies the EDID so get the EDIDs again for comparison reasons - or get the EDIDs in Windows or Linux.

If Apple includes the 4147 file, then maybe Apple tried to get the dual cable thing to work but could not do it?

 

[joetazz]

Doubled click the 7680x4320 @ 30Hz resolution (and/or the 3840x2160 30Hz HiDPI resolution) in the "Current Resolutions" list in SwitchRes X to show the timing information. Do the same for the 6720x3780@60Hz resolution.

You only included one EDID. If it shows as two screens, then you should be able to get an EDID from both.

There's a folder at /System/Library/Displays/Contents/Resources/Overrides/DisplayVendorID-10ac containing information for Dell displays (10ac is the vendor ID which encodes the three letter code of "DEL"). In that folder is a file "DisplayProductID-40b6.mtdd" describing the Dell 5K display (40b6 is the product ID). Maybe try creating a similar file "DisplayProductID-4147.mtdd" for the Dell 8K display (modify the fields to match the 8K display). The overlay part is probably an EDID which will probably need to be modified as well.

Restart after each change to the Overrides folder.

Maybe remove the existing "DisplayProductID-4147" file. The file modifies the EDID so get the EDIDs again for comparison reasons - or get the EDIDs in Windows or Linux.

If Apple includes the 4147 file, then maybe Apple tried to get the dual cable thing to work but could not do it?

Hi, Thanks for taking a look. I've attached below new EDID with both DisplayPort cables connected, switch res only gave me the option to export EDID on the first monitor but I'm presuming its included the information in this file.
Also attached below screen grabs of the two resolutions I can get with 30Hz and 60Hz.

I will take a look at those files you have mentioned but I'm not very experienced in modifying files for displays. Attached below those files you mentioned. There was a "DisplayProductID-4147" file in there already - what parameters do you think I should try? Thanks!