Widescreen Gaming Forum

I don't believe it's a problem with mDP -> DP. The signal doesn't change and it would likely affect all monitors at a time.

I'd be more inclined to look at the DP -> DVI conversion. AFAIK it goes from a passive signal to an active (timed) signal. For that same reason that nearly all GPUs would only support any combination of up to 2 DVI/HDMI mixes. HDMI = DVI + sound/network, at least signal wise.

I don't suppose either of you is in a position to test the hub with DP connections to 3 monitors?

I believe Defcoms is using the hub with DP monitors and isn't having a problem. If I had three DP monitors I would just use them but the point is the beauty of DP MST hubs is that they are a solution to the only 2 clock signals per video card limitation. The hub actually provides the timing for the devices connected to it instead of the card so you can run 3 monitors of any type from each DP on the card and it it doesn't use up a clock signal. Currently with my configuration the video card is outputing NO clock signal as it onlys sees a DP connection which doens't require one. Also I tested the hub with only one monitor plugged into it and no other connections to the card and it wtill has the blacking out issue. When I use the other port on the card to run a monitor with a passive hdmi adapter that monitor functions perfectly, only the monitor connected to the hub has problems.

P.S. Oliverman3, it seems I am still having the same issues as before. It slowed down a bit at first but now I am back to the same frequency as before I swapped hubs. I am in contact with Club 3D and working it from my end. how are you faring?

Still the same for me It has slowed down but it's still happening from time to time.
I also tried one connection with the hub and the other two with mini dvi and dvi still lost the monitor connected to the hub.
also my hub only gets a little warm 92ºf not very hot at all.

I don't have dp monitors to test but really this product should support dp to dvi or it's pretty much useless.
Not many brands offer display ports.

And love my bezel-less LG LED IPS monitors I wouldn't want to have to switch monitors due to the hub.

Frist let me say to Oliverman3, WOW I like those monitors, what model are they? And yes I agree with you that these hubs are supposed to allow us to use whatever monitorNow on to the good (bad) stuff...

"Thanks for your mail and sorry to hear about the problems you still got.
When we send the hub to you we extensively test it with our Samsung and Dell monitors, it worked with no problem here, plug and play we did 10 reboots.
So we do not think the issue is with the hub.
What we did not check is what passive cables you are using, can you let us know about that first?
Another issue can be the monitors, did you speak with Asus if your monitors are compatible with the MST hub?"

Now I'm going to get the numbers off my adapters to send them but I don't remeber reading anything anywhere about monitors needing to be compatible with MST hubs. I'm also going to ask them if these monitors are DP monitors that they are using the HDMI or DVI connection on. I don't think a "dumb" monitor cares where the signal it is getting comes from, just that is is the correct format for the cable connection. It sure seems to me the signal interupt would have to be an issue with the device CREATING that signal. It may just be me but wouldn't it would be a little hard for manufacturers to have current monitors tested since these are the first adapters to hit the market and have only been out a few months.

On the troubleshooting side, the new hub they sent has actually started blanking 2 monitors at a time now, occasionally. Again, I have NO monitor drop when rebooting, just while using them. Any new troubleshooting data from anyone out there?

They're LG 22EA63T-P they make a larger one as well.
Let me just say even though they don't have a bezel they do have like a 1/4" black area around the screen it doesn't completely display to the edge but it's the closest I could find.

I've tested mine with the LG monitors above and my sons Hans-G monitors and APOC monitors all with the same problem.
I've also used DELL DP++ DP to DVI adapters and ACCELL DP++ to DVI adapters on the hub to monitor side.
On the mini dp to dp side I'm using a Club-3d adapter that I ordered from them.

I'm sure most monitors don't say specifically that they support mst hubs since there's only one out at the moment

I'm still losing monitors here and there going in and out of games.
No real input from support. Maybe they'll eventually figure it out but for now if you do not have display port monitors I would stay away from this product unless you can deal with losing monitors here and there.
A quick switch of resolution then back to your original will reset the lost monitor but it's annoying.

A cool test would be WSGF sending one around to people here and seeing just how many have failures on the various systems.
Then document all of the hardware configurations.

I'd hate to see a kid save for buggy hardware just to waste $160 on something that does not work as it should.
I've spent well over $400 on the hub and replacing adapters that ship from Europe.

I'd donate to see the results and help others.

So this only happens with adapters ? active or passive adapters non the less?

The problem with your idea would be that 1. WSGF does not have a MST hub. and 2. Shipping this thing around the globe would be around 10-30$ per time. so after shipping 5 times you would have the original price.
Way to expensive.
WSGF members are all around the Globe.

Haldi wrote:So this only happens with adapters ? active or passive adapters non the less?

The problem with your idea would be that 1. WSGF does not have a MST hub. and 2. Shipping this thing around the globe would be around 10-30$ per time. so after shipping 5 times you would have the original price.
Way to expensive.
WSGF members are all around the Globe.

That's how it seems but the pool of people using it here is pretty small to really say.
1 out of 3 people have no issues and that one person just happens to have DP monitors while the other two have adapters.

Yeah I know probably to expensive to work unless club 3d can send test one and someone has a pool of friends close by with eyefinity setups.
or volunteers in neighboring states pass it to the next state/person. Maybe there's enough members right in the Netherlands to do some testing?
It's strange that Club-3d doesn't see this issue in their testing.

I bet 90% of people don't have DP monitors and if the hub doesn't work with adapters it's pretty much useless.
Maybe I can work out a deal with club-3d and try one more set of adapters that I get from them.

They should have the hub I returned Monday or Tuesday so maybe that will help them.

Well WLD13 I'm not sure if support has told you that they think the problem may be caused by the settings on the hub never getting reset since it's always on power You may want to try putting the hub on your surge protector and powering it off when you shut down your computer or after you reboot.

I don't really think that's the issue for me though since I do have the hub on my computers surge protector and I do power everything down when I shut my computer down.
I'm lazy I don't feel like powering on and off 3 monitors so my monitors the hub and the computer are all on one surge protector.

Next time I lose one I'll try power cycling the hub and see what that does.

Well this work around seems to be working:
Kind of cheesy that I have to power cycle the hub any time the machine is rebooted.
The Christmas tree foot pedal makes it quick though.

I'm really curious to hear if it had any affect with WLD13 since he was having more losses then I have. So far I have not lost a monitor in 3 days when manually power cycling the hub any time I reboot.

oliverm3 wrote:The Christmas tree foot pedal makes it quick though.

[little off topic] BTW, i irregularly have "screen drops" / black screen on dp monitor for 1 to 2 seconds on my 6970 eyefinity setup with 2x mini dp to dp monitors + 1 dvi... without any mst hub

Hi forum, I just bought a mst Hub recently and i have been experiancing simular issues, I use 3 Dell u2311h with native DP connections, could only get 2 monitors to run 1080p, the 3rd only ran 640x480 res. I get lots of Link failure messages. Screen blacking out, sometimes för seconds, sometimes permanent. Sometimes I cant even detect the 3rd display in catalyst. I've tried Dp cables, dvi cables with xfx active Dp adapters. I even bought 3 New monitors with Dp1.2 connectors. And the experiance was even worse. Sometimes there Will be no picture at all when I try to reboot. The New displays are u2412m. Used different drivers both catalyst 13.9 and .11 beta. I currently use 2x R9280X.
I hope there is a solution to this. Might be the driver or a faulty Hub. This has turned to a expensive nightmare.

That's pretty bad blacksight they do seem very inconsistent my last one was a lot worse then the new one they sent me with no change to my hardware. I'm currently running ATI Catalyst™ 13.11 Beta 6 with windows 8.1
Can you run all 3 monitors off the card without the hub? Just curious if you're having problems with out the hub.
Mine are solid without the hub I just get screen tearing in windows.

If you can't exchange it where you purchased it I would e-mail [email protected] they were pretty good about sending out us new hubs.

Could be a issue with the R9's I don't know anyone running them who knows how they like mst hubs.
Either way I would e-mail club-3d

blacksight wrote:Hi forum, I just bought a mst Hub recently and i have been experiancing simular issues, I use 3 Dell u2311h with native DP connections, could only get 2 monitors to run 1080p, the 3rd only ran 640x480 res. I get lots of Link failure messages. Screen blacking out, sometimes för seconds, sometimes permanent. Sometimes I cant even detect the 3rd display in catalyst. I've tried Dp cables, dvi cables with xfx active Dp adapters. I even bought 3 New monitors with Dp1.2 connectors. And the experiance was even worse. Sometimes there Will be no picture at all when I try to reboot. The New displays are u2412m. Used different drivers both catalyst 13.9 and .11 beta. I currently use 2x R9280X.
I hope there is a solution to this. Might be the driver or a faulty Hub. This has turned to a expensive nightmare.

blacksight wrote:Hi forum, I just bought a mst Hub recently and i have been experiancing simular issues, I use 3 Dell u2311h with native DP connections, could only get 2 monitors to run 1080p, the 3rd only ran 640x480 res. I get lots of Link failure messages. Screen blacking out, sometimes för seconds, sometimes permanent. Sometimes I cant even detect the 3rd display in catalyst. I've tried Dp cables, dvi cables with xfx active Dp adapters. I even bought 3 New monitors with Dp1.2 connectors. And the experiance was even worse. Sometimes there Will be no picture at all when I try to reboot. The New displays are u2412m. Used different drivers both catalyst 13.9 and .11 beta. I currently use 2x R9280X.
I hope there is a solution to this. Might be the driver or a faulty Hub. This has turned to a expensive nightmare.

Well, crap, I wish I had seen this earlier. I just ordered an Accell MST Hub (http://www.accellcables.com/K088B-002B.html) which I believe is identical in hardware to the Club3D MST Hub and am planning to run it against - guess what - 3 Dell u2311h monitors with native DP connections. We'll see what happens but I am a little worried since I am running 2 crossfired Sapphire Vapor-X 7970 Ghz edition cards which hardware-wise also are near identical to your R9 280X.

schreinereiner wrote:Well, crap, I wish I had seen this earlier. I just ordered an Accell MST Hub (http://www.accellcables.com/K088B-002B.html) which I believe is identical in hardware to the Club3D MST Hub and am planning to run it against - guess what - 3 Dell u2311h monitors with native DP connections. We'll see what happens but I am a little worried since I am running 2 crossfired Sapphire Vapor-X 7970 Ghz edition cards which hardware-wise also are near identical to your R9 280X.

From other peoples experiences I think you should be good schreinereiner they seem to work better when using native display port monitors.
Thanks for the link to the accell one I may have to try that one out as well since this seems to be a firmware issue.
Maybe Accell did it right unlike the club3d version. My second club3d hub is a lot better then the first one that I was using.

It is still an annoyance and I had to adjust the way I use my computer so that every time I reboot the hub gets powered off.

Delphium wrote:Also known as "Clover Leaf"

Or "Mickey Mouse"

oliverm3 wrote:Well this work around seems to be working:
Kind of cheesy that I have to power cycle the hub any time the machine is rebooted.
The Christmas tree foot pedal makes it quick though.

I'm really curious to hear if it had any affect with WLD13 since he was having more losses then I have. So far I have not lost a monitor in 3 days when manually power cycling the hub any time I reboot.

I remember people having similar issues with the DL Active DP adapters. They'd have to power cycle them (unplug and replug the USB power) to get the device to work. Delphium came along at one point and figured out that is was an amperage issue, and that if you plugged the adapter into an iPad power adapter (which is something like 1A), it woudl work fine.

Is everyone who's experiencing the issue turning their computer off at night? I just let mine go to sleep. Also, AMD has put me in touch with Club3D, and I will be getting a hub for testing.

There could be a few things going on here. First if your using an MiniDP > DP adapter, make sure it’s a DP 1.2. There are connectors out there that are not actually 1.2, and if it does not stat what type of DP it is it’s usually not a 1.2.
In both models it says that a HBR (High Bit Rate - 1.1 or lower) is only good up to 2 monitors at 1920x1080, and 3 if at 1600x900, if running 2560x1440 only good for 1 monitor
Whereas a HBR2 (DP 1.2) at 1920x1080 can run up to 4 monitors, at 1600x900 6 monitors, and 2560x1440 good for 2

I suggest doing 2 things, seeing if your connector to the hub weather it’s just an extension cable or a MiniDP > DP is actually a 1.2 cable. Also to drop your resolution too 1600x900 and run like that for a while.

I have been looking into these last few days before seeing this topic. It is good that I have so far not went with it, and like to know if above is a solution or not. The Monitors themselves should not be the problem at all, unless they were the MST chain ones, as this is supposed to be the solution to that at the moment. So it has to be the be either the cable to the hub or the hub itself.

Daimond wrote:There could be a few things going on here. First if your using an MiniDP > DP adapter, make sure it’s a DP 1.2. There are connectors out there that are not actually 1.2, and if it does not stat what type of DP it is it’s usually not a 1.2.
In both models it says that a HBR (High Bit Rate - 1.1 or lower) is only good up to 2 monitors at 1920x1080, and 3 if at 1600x900, if running 2560x1440 only good for 1 monitor
Whereas a HBR2 (DP 1.2) at 1920x1080 can run up to 4 monitors, at 1600x900 6 monitors, and 2560x1440 good for 2

I suggest doing 2 things, seeing if your connector to the hub weather it’s just an extension cable or a MiniDP > DP is actually a 1.2 cable. Also to drop your resolution too 1600x900 and run like that for a while.

Will report back once I have mine as well which should be mid-week. Cabling should not be an issue. Will be running the Accell hub without adapter straight from a full size 1.2 DP port on my card (http://www.sapphiretech.com/presentatio ... 1679&lid=1) to the hub and from there to 3 x 1.2 compliant cables (http://www.monoprice.com/Product?c_id=1 ... 1&format=2) and 3x Dell u2311h monitors. My main variable are the u2311h monitors since they only have 1.1a compliant DP inputs which "shouldn't" be an issue.

schreinereiner wrote:

Daimond wrote:There could be a few things going on here. First if your using an MiniDP > DP adapter, make sure it’s a DP 1.2. There are connectors out there that are not actually 1.2, and if it does not stat what type of DP it is it’s usually not a 1.2.
In both models it says that a HBR (High Bit Rate - 1.1 or lower) is only good up to 2 monitors at 1920x1080, and 3 if at 1600x900, if running 2560x1440 only good for 1 monitor
Whereas a HBR2 (DP 1.2) at 1920x1080 can run up to 4 monitors, at 1600x900 6 monitors, and 2560x1440 good for 2

I suggest doing 2 things, seeing if your connector to the hub weather it’s just an extension cable or a MiniDP > DP is actually a 1.2 cable. Also to drop your resolution too 1600x900 and run like that for a while.

Will report back once I have mine as well which should be mid-week. Cabling should not be an issue. Will be running the Accell hub without adapter straight from a full size 1.2 DP port on my card (http://www.sapphiretech.com/presentatio ... 1679&lid=1) to the hub and from there to 3 x 1.2 compliant cables (http://www.monoprice.com/Product?c_id=1 ... 1&format=2) and 3x Dell u2311h monitors. My main variable are the u2311h monitors since they only have 1.1a compliant DP inputs which "shouldn't" be an issue.

Sounds good. But yes, from the hub to the monitors should not matter the HBR rate from there. As to the hub its sending 3 screens of data in one shot, but from there it’s splitting it to 3 individual data streams. Un-like the MST daisy Chain that’s sending 3 screens of data to first monitor, then from there sending 2 screens of data to second monitor then, down to 1 for third. So everything there almost needs a high HBR such as DP 1.2 does.

DP 1.0 - 1.1 "maximum bitrate of 8.63 Gbps (gigabits per second)"
DP 1.2 "maximum bitrate of 21.6 Gbps"
HDMI 1.4a "maximum transfer bitrate is 10.2 Gbps " but this # seems to be a variable depending on Resolutions and weather is I or P as well. Also usually the combined number of Red, Green and blue channels, there seems to be no info if the other connectors fall into this as well.
DVI-I or D be it a single or double link model can vary from 1.65 - 2 Gbps roughly

I'm afraid my test run with the Accell hub will have no happy ending and I will be returning my unit.

While it resolved tearing completely I am now also dealing with monitors going into power save ALL THE F@#$%!NG time. I've played around with power settings both on the pc and monitor, different DP cabling, and monitor settings without success. It's not entirely predictable and just switching between Catalyst presets usually leaves me with blank monitors that need to be powercycled. Sometimes that doesn't help either. I've had occurrences where on boot none of the monitors powered on. Once I get them to stay on I do get non-tearing eyefinity on my three monitors but the erratic behavior of my monitors going into power save mode just isn't worth it. *sigh*