I've bought the Radeon 6800XT around start of April from the official websites. I noticed quite early that the card had some flickering issues when playing games. I've tried many solutions. For now the flickering seems to stop when change my display to 120hz instead of 144, which ins quite odd. I also must say that the Adrenaline software is laggy/confusing and too much to take in and spend time with, the standard overclocking features aren't really that useful. Would love to see Adrenaline be less confusing.
~ Fresh OS install (twice)
~ Installing latest drivers
~ Installing latest drivers without Adrenaline
~ Settings my monitors on different refresh rate (120/144)
Update: I've also experienced two blue screens since the last two days
I don't mean to be rude brother, but this topic has been a dead horse for many months now, the search function is your best friend, I've been guilty myself of this.
Basically this is an issue with FreeSync, in order to not get flickering issues you have to disable "AMD FreeSync Premium" under "Display" tab.
We have to wait until AMD fixes this.