The default clock is 900, and if I change clock to 901 through afterburner, my display
gets werid. OC to 1050 using CCC works perfect...
It is hard to explain, but I see some cracks(?) on the monitor.
It is not crashed; I don't see a blue screen.
Is it a software problem or hardware problem?
More aboutafterburner problem
To rule this out, your using v2.3.0 right?
I had the exact same problem. I fixed it by uninstalling MSI afterburner and downloading 2.3.0 (Not the BETA) from their site. Then I installed it and it worked! Now I can overclock with Afterburner without my screen getting buggy.