R9 270X BLANKSCREEN/VERTICAL LINES/GREYSCREEN CRASH after driver installed

Issue:

Im playing witcher 3 then it hangs then shutdown then i open it again the pc then it showed blankscreen / blackscreen then i reinstall the os windows 7 64bit then after i installed the amd driver it goes blankscreen everytime i go safe mode and disable it then reinstall nothing happens..Then I installed catalyst driver 14.4 i think then in the middle of the installation it shutdown and I opened it again then it showed lines then after the lines it showed greyscreen with black lines then it shutdown and my psu died no power then the next day i change my psu i thought it will be fix then the vertical lines showed again i tried reinstalling drivers nothing happens I hope it will be fix..

THANKSSS 4 days no pc

Thanks!

ASAP