bsod caused by atikmdag.sys

haee11

Reputable
Jun 21, 2014
6
0
4,510
hi guys.
few weeks ago i had an unknown error massage i thought it's not important but this error continued to appear randomly.
i have the dmp files it's attached to post but before you help me to find why this error appears and how can i solve it i want to mention that i'm 90% sure that this error started to appear after i installed the ati 14.6 beta driver also i think my gpu have been damaged during few days ago because my pc freezed and when i am working with my pc (playing games for example) it just slows down and it starts to kind of like tick for a few seconds.
here are the dump files:

http://www.mediafire.com/download/9505cwr5jrfzm4c/Minidump.rar