I have an odd one, nothing I've ever seen before anyway.
I recently upgraded my system as follows:
Intel Core i7 2600k
Asus Z68 Chipset Motherboard
8Gb G-Skill RAM
Asus DCII 2Gb 6970
Asus VK278Q Monitor
I've been playing a bit of Oblivion recently, to prepare myself for Skyrim
After a random amount of time playing, my screen will split in half like this.
EDIT: I forgot to mention that the display problem continues after exiting into windows.
Unplugging the monitor (I'm using DVI at the moment, until I can be bothered to get a DP cable) and plugging it back in fixes the problem temporarily, as does restarting the PC. Changing resolution does nothing, if anything it screws things up even worse. There have been times I've been able to play for hours without the problem ocurring, other times it happens after a few minutes. I've been running a 2 monitor setup with my old 22" Samsung display and regardless of whether or not I disable the extra display, it still happens, and happens to both monitors when I'm running both displays.
I'd like to hope it's not a problem with the GPU, as that is going to be a major pain in the butt to deal with, as I ordered it online.
Keeping an eye on temperatures, the GPU is running at a balmy 50ish deg C.