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Robotronic
(@robotronic)
New Member
Joined: 1 month ago
 

I have an iHack with a 5500XT and a Pro Display XDR connected with the Belkin VR cable. Works fine at true 6K with DSC in Catalina, but in Big Sur I get 6K scaled with actual output at 4K and DSC disabled according to AGDC Diagnose. Just updated to 11.2 RC (20D53) and the issue persists, unfortunately. 

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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刘子琦
(@b563052622)
Active Member
Joined: 3 months ago
 

@tim, Apple stiil didn't fix the bug in 11.2 RC 

 

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TiM
 TiM
(@tim)
Active Member
Joined: 4 years ago
 
Posted by: @b563052622

@tim, Apple stiil didn't fix the bug in 11.2 RC 

 

Ah yep. Thanks for that. I just managed to finally test it on my MacBook Pro as well, and can confirm I got the same results.

Well. HOPEFULLY 11.2 will go live to the public this week, and we can only hope that 11.3 will come around soon enough the corner to fix this.

2017 13" MacBook Pro [7th,2C,U] + GTX 1080 Ti @ 32Gbps-TB3 (Razer Core) + Win10 [build link]  

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Robotronic
(@robotronic)
New Member
Joined: 1 month ago
 

I did some more tests with my iHack running 11.2 RC3 (20D64), and discovered the following: with the ProDisplay XDR connected using the included Apple TB3 cable to a 5500 XT via pass-through with a Titan Ridge card I can get full 6K output with DSC enabled, but with the PD XDR connected direct to the 5500 XT with the Belkin VR cable, I only get scaled 4K output.

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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刘子琦
(@b563052622)
Active Member
Joined: 3 months ago
 

MAC OS  11.2 is released, Anyone give a try?

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fatheroates
(@fatheroates)
Active Member
Joined: 1 month ago
 

I am on 11.2. It is still not possible to do 144Hz at 4K and you are capped at 95Hz with DSC. 

 

e: Got desperate and emailed Craig Federighi. He responded "Thanks for the report."

 

Screen Shot 2021 02 02 at 12.32.38

 

 

This post was modified 4 weeks ago

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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TiM
 TiM
(@tim)
Active Member
Joined: 4 years ago
 

I just tested the final shipping version of Big Sur 11.2 and can confirm I still had the same issues as before. I've updated my Apple Bug Report ticket to reflect this.

Oh sweet! Well done on hearing back from Craig Federighi! That's certainly a good indication that they're very much aware of this issue. Smile

Welp. Now that 11.2 is done and dusted, we should hopefully be seeing 11.3 beta 1 at some point very soon.

EDIT: *sigh* Tested on Big Sur 11.3 beta 1 that released this morning. Still no change.

This post was modified 4 weeks ago
2017 13" MacBook Pro [7th,2C,U] + GTX 1080 Ti @ 32Gbps-TB3 (Razer Core) + Win10 [build link]  

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刘子琦
(@b563052622)
Active Member
Joined: 3 months ago
 

@tim, 11.3 beta2 is released..Anyone tried?

 

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TiM
 TiM
(@tim)
Active Member
Joined: 4 years ago
 

Oh yep! I tried it this weekend. Somewhat good news! I can confirm on my end that 11.3 beta 2 brings it back to where it was in 11.0. Where I can actually set my desired resolutions properly again (In this case, 5K but downscaled to a 4K panel), but DSC still isn't enabled so I can only see about 98FPS instead of my usual 144FPS.

It's certainly an extremely good step in the right direction. Smile

image from ios 720
2017 13" MacBook Pro [7th,2C,U] + GTX 1080 Ti @ 32Gbps-TB3 (Razer Core) + Win10 [build link]  

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刘子琦
(@b563052622)
Active Member
Joined: 3 months ago
 

Just tried on MACBOOK Pro 16''   5500M  11.3 beta2 ,The problem has been finally fixed. dp 1.4    4K 144HZ HDR.

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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