All. Now I definitely found the reason!
In the driver settings. Create a custom extension and change the synchronization standard! Switching to CVT helped me! On CVT (low noise level) - it stands by default - the strip flickers again! He returned to CVT and there is no flickering stripes again!
I think those who are experiencing problems with with flickering stripes try different options for this option to find the best one for their monitor.
Thanks to all. The problem is found and resolved. Sorry for bad english. I use google translate.
