Issues with eyefinity.

[Akrian]

Hello ladies and gentlemen of this amazing forum.
It appears that I need your wisdom to solve this problem I have here.
Back couple of months ago I've finished my "Mark II" build ( yes, name is tottaly inspired by Mr. Stark). The build carries 3x7970 watercooled on board.
Now, since back then I was still finishing my degree, I was stuck with one 120hz monitor, and everything was fine.
Now 5 days ago I've decided to donate that monitor to my second PC, and replace it with three LED monitors for basic eyefinity setup.
The monitors arrived, and I've installed them, no dead pixels, all works great, well almost great.
Here's the problem:
I get strange horizontal lines ( usually a bunch of them), across the screen, for a fracture of a second, when I pop any video or anything that involves flash. after they manifest themselves for that fracture of a second, the rest of the video/flash can be watched without them reappearing.
Here's something even more strange : depending on which monitor I select as primary, the location ( aka the whole monitor) where the lines appear changes. So for example : screen 1 with active mini-dp to DVI port being primary display -> and displays 2 and 3 get the lines artifact.
If screen 3 ( DVI-D port) is selected as primary -> screen 1 with active mini dp to DVI gets the lines.
The lines do NOT appear when I run 3d mark 11 on performance/extreme and even manual over-extreme settings with maxed resolution. The lines do NOT appear when I do the same in Heaven 3.0, GTA IV, METRO 2033, BF3. ( with 1200/1630 OC on the cards).
The lines disappear when I take the memory OC on the cards away leaving 1200/1375. The lines come back as soon as I even mention any kind of overclock on memory such as 1200/1395.
The cards do not overheat as they are watercooled.

I can see how it could be the overclock, but then again the change of the lines location depending on primary screen select via drivers, indicates otherwise. Also if it was an overclock issue, why would any intense 3d game or benchmark run completely fine for hours without them popping up.

Anyone has the same issue ? had the same/similar issue ? happens to know the remedy ?
Any help is appreciated. Thank you for your time reading this post.

P.S. flash being opened through Opera/Firefox/even IE.
Did not try dreamweaver

 

[Law-II]

Hi

After reading through the WOT, there's no mention of the following;

What version of catalyst driver is installed?

What version of flash is installed?

This may help the TPU community to assit you

nb: please report this to the AMD driver team if you have not done so already;
here - http://www.amdsurveys.com/se.ashx?s=5A1E27D20B2F3EAC

atb (all the best)

Law-II

 

[cadaveca]

Anyone has the same issue ? had the same/similar issue ? happens to know the remedy ?
Any help is appreciated. Thank you for your time reading this post.

Yes, perfectly normal behavior for Eyefinity.


It is NOT flash causing the problems...it's the clock changing due to hardware accelleration that causes the problem. All monitors connected to the card have slightly different times when they the image refreshes, and it doesn't matter if you have 3 monitors the same... When the clocks change, the one screen doesn't get the full image drawn properly, and it causes this artifact.

This is because there are two different types of display outputs used, rather than a singular output. The primary dispaly gets the first refresh, it seems, and then one of the secondary monitors gets flicker.


So no, it is NOT about overclocking. The reason that it's affected by clcoking though, is becuase frames are drawn to memory before going out to the monitors themselves, and changing the speed of the memory changes the time it takes to write and to access that memory space.

In fact, for Eyefintiy, I recommend NO VGA CLOCKING. I have HD6950's that can unlock shaders...I leave them at stock, and even bought a third card in hopes taht might give enough performance...and instead, the 3rd card makes the system perform SLOWER than two card, with current drivers.

 

[Akrian]

My bad, for some reason I thought I've wrote the specs etc down.
Here:
Cata 12.7 Beta + CAP 12.6
FP version: 11.2.202.235

 

[Akrian]

Yes, perfectly normal behavior for Eyefinity.


It is NOT flash causing the problems...it's the clock changing due to hardware accelleration that causes the problem. All monitors connected to the card have slightly different times when they the image refreshes, and it doesn't matter if you have 3 monitors the same... When the clocks change, the one screen doesn't get the full image drawn properly, and it causes this artifact.

This is because there are two different types of display outputs used, rather than a singular output. The primary dispaly gets the first refresh, it seems, and then one of the secondary monitors gets flicker.


So no, it is NOT about overclocking. The reason that it's affected by clcoking though, is becuase frames are drawn to memory before going out to the monitors themselves, and changing the speed of the memory changes the time it takes to write and to access that memory space.

In fact, for Eyefintiy, I recommend NO VGA CLOCKING. I have HD6950's that can unlock shaders...I leave them at stock, and even bought a third card in hopes taht might give enough performance...and instead, the 3rd card makes the system perform SLOWER than two card, with current drivers.

Thanks for the explenation. I've disabled hardware acceleration of flash, seems to solve the problem, except when windows loads, it goes wild on initial loading screen only now, but that's not a big issue.

So if I get 2 active mini-dp to DVI and DVI on one, it will minimize the effect ?