Multiple monitors. Display is glitchy when both are connected

I really don't know how better to describe it then the video, but it seems that when it's just a static image there is no issue, but as soon as there is significant motion (such as moving windows around or playing a video) things become all nasty looking, as if a card was failing or something. But I have zero issues when just one display - either display, and if I hook each display to their own card it works (but I have to disable Crossfire)

Videocards are both MSI Gaming R9 290
Display 1 is 1360x768@60Hz HDMI
Display 2 is 1280x1024@60Hz DVI (75Hz native, no improvement)
Issue is present when both displays are connected to the same video card no matter what cables or ports I use.
When one is connected to a different video card the issue is not present no matter which ports are used, but Crossfire has to be disabled.

Yeah, I've been checking the forums. It seems that the problem is that the minimum memory clock is too low, but I haven't the faintest idea as to how to change that. It works fine connecting each monitor to a different card, and i can manually enable crossfire for the few games that benifit from it, But I think I'll need to try to find a permanent solution for when I try to get a third display hooked up.

Ok what the hell. Three monitors work perfectly. The solution was to add another monitor. That's like the exact opposite of a solution. And it works.