Game/3D Flickering on Samsung U28D590D and Crossfire Gigabyte HD7970 OC

[rorschakjenkins]

Hi I am having the following issue: does anyone know of a solution?

I have a Samsung U28D590D running on its full resolution (3840x2160 @60Hz) using a Displayport v1.2 cable (http://www.scorptec.com.au/product/Cables/DisplayPort/55419-MDP-DP-02-MM)

I am using 2x 7970 in crossfire: (Gigabyte GV-R797TO-3GD 3GB)

Everything runs fine when I am running application on desktop. The moment I turn on a Full screen 3D application, for example like the "PCI Express Render Test", or ANY game, I get massive amounts of purplish screen flicker. At ANY resolution.

The only way to get rid of this is by disabling crossfire, and when I do that, all games run fine. But, then I have an expensive coaster installed in my gaming rig.

I read (here: http://www.tomshardware.com/forum/id-2165690/samsung-u28d590d-sapphire-290x-issues.html) that it might be a DP cable issue, and replacing it with an Amazon linked cable in that thread might work. (ordered in, expected Aug 12th - global shipping to Oz!)

But I am also reading on various sites that this may be an AMD driver issue... Any help with resolving my issue would be much appreciated.

 

[rorschakjenkins]

Kept tinkering with different things, and accidentally stumbled upon the solution. The xfire bridge. One of the connectors, if pressed in too tight, causes screen flickers when xfire is activated by a game/3D.

Tried live manipulation of the one connector by pulling it slightly outward until the flickering completely stopped.

Wondering whether replacing the connectors would fix this permanently or whether the issue is on the 7970s. Anyway I'll see how long this temp fix lasts!