Looks great Kent, you certainly keep your rig clean!
I hope you manage to resolve the glitch, you could try some slightly older drivers for the 780 to see if that makes any difference.
Thanks, I try to keep it clean.
I've come to the conclusion that the glitch (jitter, actually) is the Asus monitor. It seems entirely random, as in there's nothing I can do to induce the jitter.
The monitor has my "media repository" machine running Ubuntu 10.04 as a second input, I have experienced random 1 second black screens with both machines, the jitter occurs only on the Windows machine.
It's not load related, jitter can occur when idling at the desktop or when under heavy GPU/CPU load. I ran IBT many times and the jitter happened only once and didn't affect the results.
It's not drivers as the jitter occurred in the BIOS screen when I was setting the clocks back to default. Default clocks made no difference in Windows so I put back my OC settings.
I've tried the Asus as a single monitor, still get jitter. I then ran just the Hannspree monitor and got no jitter.
The Asus is the only monitor I have with 1920x1200 resolution, so I suppose that there is still a slight possibility that it's the graphics card but since I get the momentary black screens on two different systems, the evidence points strongly at the monitor.
Been web-browsing now for a couple of hours with no problem...guess I'll just live with it until it gets worse or something breaks.