Originally Posted by Mussels
one DVI one HDMI - for a while i ran triple with 2x VGA and one DP-> DVI, and all were flicker free.
Might be the use of VGA that saved ya. Using dual DVI now, anytime the clocks switch, say for youtube acceleration, the secondary monitor flickers(I'm currently only using 2 monitors). The same also happens using DP with just two. Using DP + DVI, and three monitors, either with 1 DVI or TWO, I get the same flicker.
Before the clock-change fix, the flicker was almsot random, so it's definitely better, but it's not 100%.
Based on how the display output works, I think the ability to use different resolutions is a 7-series only feature, but here's hoping it's not.