R9 270 memory overclock flashing screen problem

TheOneOverTHere

Honorable
Dec 9, 2013
9
0
10,510
So

I have a Gigabyte r9 270 oc 2gb windforce card.
I did oc to 1050mhz core and memory 1500mhz max temps are 59-63 celsius debends what games im running.
When i did make it back to normal speed core 975mhz and memory 1400mhz my screen flashes and shows artifacts for less then a second. Before that my screen went like that ( http://linustechtips.com/main/topic/13236-primary-display-corrupts-when-watching-youtube-videos/ <-- same kind of distortion that i first got and i can watch youtube.) when i use my another monitor only Dell 1909W(at 75hz) it dosnt happen. Only on my BenQ xl2411z (at 144hz). That is wierd. Should i be scared that my card might be dying ?