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etc

macrumors regular
Sep 27, 2008
235
50
The Moshi cable does work as expected! I was getting some tearing (v-sync didn't work) but I think it was confused because my usual display has G-Sync...

Im working with 3D Game engines. do you get tearing in 6k? 1440p seems ok. (GPU is not maxed in 6k!)
Do you see tearing in 3D scene or it appears everywhere in the system? Like when you drag the window. I don't any tearing anywhere, actually.
 

triton100

macrumors 6502a
Dec 15, 2010
818
1,341
The moon
Just bought USB-C + DisplayPort addon card for Dell Precision, Model 0WYY76 (low profile, unfortunately) and can confirm that it works with 2080 Ti at full 6K@10bit HDR.

Will try it in macOS with RX580 (should show at least 5K)
Could you link to the display parrot card you mean please. Was it an adapter?
 

etc

macrumors regular
Sep 27, 2008
235
50
Could you link to the display parrot card you mean please. Was it an adapter?
You can find useful info here:

I use pci-e add-in card (with RX6600XT specifically to drive XDR in Mac OS). There're several models listed in this article, practically all the same, but with different brackets & availability on markerts. Try to find any on UK market.
 

triton100

macrumors 6502a
Dec 15, 2010
818
1,341
The moon
You can find useful info here:

I use pci-e add-in card (with RX6600XT specifically to drive XDR in Mac OS). There're several models listed in this article, practically all the same, but with different brackets & availability on markerts. Try to find any on UK market.
Thanks this all looks too complicated for me though. I’m a Mac guy and all this PC stuff is really confusing. Hopefully I can just find a cable that works. I’m surprised you can’t just use an hdmi cable with a usbc adapter to connect it to the xdr.
 

etc

macrumors regular
Sep 27, 2008
235
50
Thanks this all looks too complicated for me though. I’m a Mac guy and all this PC stuff is really confusing. Hopefully I can just find a cable that works. I’m surprised you can’t just use an hdmi cable with a usbc adapter to connect it to the xdr.
It's just because XDR is supposed to be used by Mac guys with Macs =)
BTW you can find cable solutions in this article too.
 

Daniel M8

macrumors newbie
Jul 6, 2023
5
0
Hello, I have LG Ultrafine 5K 27MD5KL and have connected it with the Belkin VR cable to RTX 3090 custom-built PC. I was wondering whether there is a chance of getting it to run 5k instead of the current 4k (no option to install TB PCIe card). I also experience the USB port on the monitor having a regular about 1-second disconnect. Does anyone have a similar setup?
 

etc

macrumors regular
Sep 27, 2008
235
50
Hello, I have LG Ultrafine 5K 27MD5KL and have connected it with the Belkin VR cable to RTX 3090 custom-built PC. I was wondering whether there is a chance of getting it to run 5k instead of the current 4k (no option to install TB PCIe card). I also experience the USB port on the monitor having a regular about 1-second disconnect. Does anyone have a similar setup?
How is your question related to Pro Display XDR?
 

Seiko4169

macrumors member
Jun 18, 2012
90
53
England
resurrecting this old thread as it appears a wealth of knowledge for XDR and graphic cards on Windows. So, I think I'm coming to the conclusion that my Mac Pro 7.1 and Vega II MPX cannot drive the XDR at full resolution on bootcamp / windows? The Vega II does not support DSC so am I out of luck? Can someone please confirm whether this is correct and if so any work arounds?
 

etc

macrumors regular
Sep 27, 2008
235
50
resurrecting this old thread as it appears a wealth of knowledge for XDR and graphic cards on Windows. So, I think I'm coming to the conclusion that my Mac Pro 7.1 and Vega II MPX cannot drive the XDR at full resolution on bootcamp / windows? The Vega II does not support DSC so am I out of luck? Can someone please confirm whether this is correct and if so any work arounds?
Did you try other solutions like Belkin VR cable or Wacom Link? And USB-C to DisplayPort adapter with them. I think they can force Windows to use USB-C DP Alt Mode (with DSC) through TB3 port of Vega.
 

Seiko4169

macrumors member
Jun 18, 2012
90
53
England
Thanks for replying. Nope, not yet. I don't have the XDR display yet and didn't want to purchase additional cables in the hope it might work. I was hoping someone might have the same setup and could vouch which if any technique will work. I noticed that the old Max Tech video gaming on a 21K setup suggested that the original bootcamp drivers supported the 6k resolution but when switching to bootcampdrivers dot comm to game they lost the 6k?

what I don't understand is if the Vega doesn't have DSC how can you achieve the 6k in the first place?
 
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etc

macrumors regular
Sep 27, 2008
235
50
what I don't understand is if the Vega doesn't have DSC how can you achieve the 6k in the first place?
Why you think it doesn't have it? It could be an another problem with TB connection under Windows. At least I couldn't get 6K using TB3 expansion card on PC and it's only related to how Windows manages TB connections. Your Vega has TB3 outputs too, so they are probably used as TB ports by Windows.
 

etc

macrumors regular
Sep 27, 2008
235
50
The spec sheet for the Vega II states it doesn't have DSC
Hmm, I couldn't find it actually. I've found a single post about Vega II and DSC was claimed as unsupported, but that was based only on the fact that Apple didn't state in specs that it was supported. For me that's not that easy)

It just strange, because it should definitely support at least DP 1.4 (via TB transport) and DSC is a part of that standard. DSC was introduced itself in 2013.
 

PaulD-UK

macrumors 6502a
Oct 23, 2009
933
540
On the AMD GPUs that Apple used DSC wasn't supported until they moved to Navi in 2020, after Vega.
 
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PaulD-UK

macrumors 6502a
Oct 23, 2009
933
540
@Seiko4169 said:
"what I don't understand is if the Vega doesn't have DSC how can you achieve the 6k in the first place?"

Because Apple devised a mode previously used internally (via the eDP screen cable) on 2014+ iMac 27 and externally on the LG 5K TB monitor, that made 5/6K possible by sending 2 streams of uncompressed DP1.2 video - each handling one half of the screen - down one Thunderbolt 3 cable. Each half is less than 4K so manageable.

But the video drivers/firmware must know how to handle this special mode.
I would guess because this is how the low end GPU of the Mac Pro 2019 works that bootcamp drivers should be OK?
 
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etc

macrumors regular
Sep 27, 2008
235
50
@Seiko4169 said:
I would guess because this is how the low end GPU of the Mac Pro 2019 works that bootcamp drivers should be OK?
2018 Intel MBP also supports XDR but it has Radeon 555X or 560X which definitely do not support DSC. Okay, it seems Apple invented the same 2-stream way here as with LG 5K.
 

etc

macrumors regular
Sep 27, 2008
235
50
On the AMD GPUs that Apple used DSC wasn't supported until they moved to Navi in 2020, after Vega.
Okay, I understood.

BTW I couldn't get 6K in Windows using TB3 add-in card with 2080 Ti (it supports DSC).

Thankyou, That's good to hear and would explain the results from Max Tech?
I think the best idea is to find a used W6600X module.
 

dops

macrumors newbie
Mar 13, 2017
13
1
Sorry, posted this in the wrong thread and cannot delete it - can be deleted by any admin or moderator
 

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er2429

macrumors regular
Jul 23, 2009
112
46
Vega II seems to show 6k resolution but hdr video streaming doesn't seem to work, so no HDR on win10?
I don't have a Vega II but there shouldn't be any technical reason why it doesn't work. What is your configuration and connection from Mac Pro to Pro Display? I think the only thing that will certainly not work is USB-C Alt Mode unless you have DSC. It also should work in macOS as well.

 

Seiko4169

macrumors member
Jun 18, 2012
90
53
England
Works in Mac OS just fine but win 10 and win 11 both say streaming video hdr is not supported.

Tried 6, 8 and 10 bit colour and Ive set the ProDisplay option in both Mac and bootcamp option.

HDR is supported BUT streaming says it isnt so I assume a driver issue.

Have tried both sets of bootcamp drivers but the windows HDR option doesnt stick.

Also tried two different cables and actually 2 different Vega II cards.

No joy.
 
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