Rage3D - AMD Eyefinity & DisplayPort Difficulties

***Lupine*** · Feb 7, 2013, 03:15 PM

Long time Eyefinity users will likely be familiar with the Display Port Link Failure message, interrupting their gaming session and ruining their immersion. Drivers, right? Perhaps not, maybe it's the cable - and an ecosystem certification problem.

AMD Eyefinity & DisplayPort Difficulties @ Rage3D.com

***Ichneumon*** · Feb 8, 2013, 12:33 AM

Really interesting article James. Thanks for the writeup on your findings... I'm certain I'm not the only one who will be much more careful in my purchase of future displayport cables as a result.

Dr. Zhivago · Feb 8, 2013, 11:13 AM

Good stuff dude. I haven't run into these kinds of problems, but my machines are used in a production environment. Also, most of the time when using Eyefinity SLS or multiple outputs in extended mode, I'm using the mDP > DVI adapters along with the native DVI outputs. Last week, I was using DP > DP cables with no issues however.

noko · Feb 8, 2013, 03:24 PM

Wow! Pretty good find there. Amazing this wasn't found out eons ago. Doesn't Apple solely use DP now? I wonder if their cables and accessories meet Display port standards? If they too had issue due to power being passed back to the card?

caveman-jim · Feb 8, 2013, 03:37 PM

There is one cable that has been certified, it's available in 6' and 10' lengths and only has full size connectors. All the others are roll the dice and see what you get.

This is one of the worst kinds of problems, it's not a clear work/don't work; it's intermittent and really hard to figure out what you did that made it work/not work.

moheban79 · Feb 8, 2013, 05:20 PM

Nice write up! I have had issues as well though maybe not as severe as causing those kinds of crashes or instability. Basically I get a lot of terrible flickering, banding, and tearing when playing some games like Borderlands 2 in eyefinity mode when vsync is forced off. This renders the game unplayable. Sometimes happens with other games and the ones that work I suspect is because the games turn on Vsync. I have tried two different mini-dp dongles (Accell and XFX dongle [not sure of brand]) mixing dp with dvi using one or both dongles, moving preferred display, alternating dvi freq and reducing dvi frequency setting and none of that works.

Only way is to turn on vsync which limits max gpu utilization among my three 6970s that have three Samsung PX2370 LED monitors attached. Using the 13.2 beta 4 right now in Trifire mode. This hasn't worked right since 12.3 honestly but I'm happy limited to 60fps as its very smooth non the less but would like better fps even still. All the research I did only found that its a hardware dp - dvi timing issue. No real fix. Complained to AMD few months back and they sent me a third broken dp dongle that didn't even work. What I am confused about is if its even possible to mix dvi and dp dongles when vsync is off?

Thanks.

colson79 · Feb 11, 2013, 09:22 AM

Interesting article. I guess I am lucky, I went eyefinity about 6 months ago and I haven't had any issues at all with my setup. I have 3 monitors and they have a display port and a dvi port. I am using 2 7970 GPU's and I have two monitors connected with mini DP to DP cables and the 3rd on DVI.

Talon_262 · Apr 13, 2013, 06:34 PM

Quote:

Originally Posted by noko

Wow! Pretty good find there. Amazing this wasn't found out eons ago. Doesn't Apple solely use DP now? I wonder if their cables and accessories meet Display port standards? If they too had issue due to power being passed back to the card?

You can thank fellow Rager 'Craz'...he seems to be the one who came across this DP pin 20 voltage issue and did a lot of the legwork testing it out; cavey picked it up and ran with it to get some answers from AMD and VESA.

Good work from everyone involved.

caveman-jim · Apr 13, 2013, 09:02 PM

that post is directly linked to in the article.

Dr. Zhivago · May 31, 2013, 09:32 PM

I've been repeatedly bugging BizLink to call me and give me an ETA on the MST Hub that is mentioned and pictured in the AMD Knowledge base. Here's the 2 places that it is mentioned and pictured:

http://support.amd.com/us/certified/...dpcapable.aspx

http://support.amd.com/us/kbarticles...splayPort.aspx

As you can see, those articles are very recently updated. I finally got a call yesterday from Steven of Accell Corp., which is owned by BizLink. He told me a limited shipment of the hubs, both DP and mDP versions, would be arriving the first week of July at Accell. They will need to be SKU'd with some vendors and then shipped. So, sometime in July some of them will be available.

Just an FYI for everybody.

Peace.

caveman-jim · May 31, 2013, 09:50 PM

Hooray!

Dyre Straits · Jun 1, 2013, 04:41 AM

I can only say, "It's about time!"

contrails · Jan 10, 2014, 05:42 AM

I am having DP link failure error,
I have visiotek 900614 Radeon HD 7750

http://www.newegg.com/Product/Produc...140109212436:s

powering 4 AOC 29-inch IPS Q2963PM monitors

http://www.amazon.com/gp/product/B00...=eauciuen0a-20

connected through generic mini DP to DP cable
http://www.amazon.com/gp/product/B00...=eauciuen0a-20

Do you think if I upgrade the cable to mini DP to DP 1.2 this issue will be resloved?

I am looking at this cable

http://www.amazon.com/gp/product/B00...=eauciuen0a-20

Many thanks for your input

caveman-jim · Jan 10, 2014, 03:24 PM

If that cable is on the list of tested cables at VESA website, yes.

Feb 7, 2013, 03:15 PM	#1	Advertisement (Guests Only) Login or Register to remove this ad
*Lupine* Administrator Join Date: Sep 2002 Location: where I stand Posts: 32,673	Rage3D - AMD Eyefinity & DisplayPort Difficulties Long time Eyefinity users will likely be familiar with the Display Port Link Failure message, interrupting their gaming session and ruining their immersion. Drivers, right? Perhaps not, maybe it's the cable - and an ecosystem certification problem. AMD Eyefinity & DisplayPort Difficulties @ Rage3D.com

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Feb 8, 2013, 12:33 AM	#2
*Ichneumon* Lord of the Flies Join Date: Sep 2000 Location: Michigan Posts: 3,735	Really interesting article James. Thanks for the writeup on your findings... I'm certain I'm not the only one who will be much more careful in my purchase of future displayport cables as a result. __________________ Ichneumon http://www.rage3d.com "A lie gets halfway around the world before the truth has a chance to get its pants on. " - Sir Winston Churchill (1874-1965)

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Feb 8, 2013, 05:20 PM	#6
moheban79 Radeon R100 Join Date: Jan 2012 Posts: 26	I knew it! Nice write up! I have had issues as well though maybe not as severe as causing those kinds of crashes or instability. Basically I get a lot of terrible flickering, banding, and tearing when playing some games like Borderlands 2 in eyefinity mode when vsync is forced off. This renders the game unplayable. Sometimes happens with other games and the ones that work I suspect is because the games turn on Vsync. I have tried two different mini-dp dongles (Accell and XFX dongle [not sure of brand]) mixing dp with dvi using one or both dongles, moving preferred display, alternating dvi freq and reducing dvi frequency setting and none of that works. Only way is to turn on vsync which limits max gpu utilization among my three 6970s that have three Samsung PX2370 LED monitors attached. Using the 13.2 beta 4 right now in Trifire mode. This hasn't worked right since 12.3 honestly but I'm happy limited to 60fps as its very smooth non the less but would like better fps even still. All the research I did only found that its a hardware dp - dvi timing issue. No real fix. Complained to AMD few months back and they sent me a third broken dp dongle that didn't even work. What I am confused about is if its even possible to mix dvi and dp dongles when vsync is off? Thanks.

Feb 8, 2013, 11:13 AM	#3
Dr. Zhivago Sound: Serious Business Join Date: Feb 2003 Location: Oregon Posts: 8,259	Good stuff dude. I haven't run into these kinds of problems, but my machines are used in a production environment. Also, most of the time when using Eyefinity SLS or multiple outputs in extended mode, I'm using the mDP > DVI adapters along with the native DVI outputs. Last week, I was using DP > DP cables with no issues however.

Feb 8, 2013, 03:24 PM	#4
noko Radeon Arctic Islands Join Date: Sep 2000 Location: Orlando, Florida, USA Posts: 8,691	Wow! Pretty good find there. Amazing this wasn't found out eons ago. Doesn't Apple solely use DP now? I wonder if their cables and accessories meet Display port standards? If they too had issue due to power being passed back to the card?

Feb 8, 2013, 03:37 PM	#5
caveman-jim Deposed King of Rage3D Join Date: Oct 2003 Posts: 49,000	There is one cable that has been certified, it's available in 6' and 10' lengths and only has full size connectors. All the others are roll the dice and see what you get. This is one of the worst kinds of problems, it's not a clear work/don't work; it's intermittent and really hard to figure out what you did that made it work/not work.

Feb 11, 2013, 09:22 AM	#7
colson79 Radeon R200 Join Date: Oct 2002 Posts: 95	Interesting article. I guess I am lucky, I went eyefinity about 6 months ago and I haven't had any issues at all with my setup. I have 3 monitors and they have a display port and a dvi port. I am using 2 7970 GPU's and I have two monitors connected with mini DP to DP cables and the 3rd on DVI.

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Apr 13, 2013, 09:02 PM	#9
caveman-jim Deposed King of Rage3D Join Date: Oct 2003 Posts: 49,000	that post is directly linked to in the article.

May 31, 2013, 09:32 PM	#10
Dr. Zhivago Sound: Serious Business Join Date: Feb 2003 Location: Oregon Posts: 8,259	MST Hubs are arriving in July. I've been repeatedly bugging BizLink to call me and give me an ETA on the MST Hub that is mentioned and pictured in the AMD Knowledge base. Here's the 2 places that it is mentioned and pictured: http://support.amd.com/us/certified/...dpcapable.aspx http://support.amd.com/us/kbarticles...splayPort.aspx As you can see, those articles are very recently updated. I finally got a call yesterday from Steven of Accell Corp., which is owned by BizLink. He told me a limited shipment of the hubs, both DP and mDP versions, would be arriving the first week of July at Accell. They will need to be SKU'd with some vendors and then shipped. So, sometime in July some of them will be available. Just an FYI for everybody. Peace. Last edited by Dr. Zhivago : Jun 1, 2013 at 08:45 AM.

May 31, 2013, 09:50 PM	#11
caveman-jim Deposed King of Rage3D Join Date: Oct 2003 Posts: 49,000	Hooray!

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Jan 10, 2014, 05:42 AM	#13
contrails Newbie Join Date: Jan 2014 Posts: 1	displayport link failure after sleep I am having DP link failure error, I have visiotek 900614 Radeon HD 7750 http://www.newegg.com/Product/Produc...140109212436:s powering 4 AOC 29-inch IPS Q2963PM monitors http://www.amazon.com/gp/product/B00...=eauciuen0a-20 connected through generic mini DP to DP cable http://www.amazon.com/gp/product/B00...=eauciuen0a-20 Do you think if I upgrade the cable to mini DP to DP 1.2 this issue will be resloved? I am looking at this cable http://www.amazon.com/gp/product/B00...=eauciuen0a-20 Many thanks for your input

Jan 10, 2014, 03:24 PM	#14
caveman-jim Deposed King of Rage3D Join Date: Oct 2003 Posts: 49,000	If that cable is on the list of tested cables at VESA website, yes.

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