BSOD atikmpag.sys

[Belfor]

Hello!
Recently i bought new PC
i5 4460
msi B85m-G43
2x4GB G-skill 1600 cl7 RAM
AMD R9 270x MSi gaming
CM G550m PSU

It was like 2 months ago and there were no issues whatsoever. Games ran flawlessly etc
5 days ago i decided i want to play some Witcher 2 so i downloaded it from Steam and wanted to play. In the beginning of playing (in loading) Witcher 2 crashed (not responding) so i turned it off and turn again without any issue. I played in like 20minutes to see is its working or has to be re-installed or something.
When i closed the game and went to desktop some weird arifacts went all over my screen and after few seconds it BSOD.
From that time i cant play/benchmark anything bcos of those BSOD's.. Today i ran 1hour loop of unigne valley at max settings (99% GPU usage) but the temperature was steady 65C. When i quit benchmark and went to desktop it BSOD again.
Temperatures of stress testing:
CPU: 52C
GPU: 65C
I uploaded dmp file so you can see what is that.
PLEASE HELP ME

Edit:
I forgot to mention that i checked my GPU drivers and tried 3 of them (latest, latest beta,last) and no fix appeared, still got BSOD
I checked other SSD, installed whole system, drivers and ungine valley. It was pure new system and it BSOD the same as last time.

Zippyshare.com - Dump.rar

 

[Boozad]

Can you upload the logs directly to the forum please.

 

[Belfor]

Could you tell me how can i do that ? I'm BSOD noob

 

[Boozad]

http://www.sevenforums.com/tutorials/9733-screenshots-files-upload-post-seven-forums.html

 

[Belfor]

It says that the .dmp file is invalid. I can't upload it from here so i give you screenshot from BSOD viewer.

 

[Boozad]

Follow http://www.sevenforums.com/bsod-help-support/96879-blue-screen-death-bsod-posting-instructions.html and upload the resulting .zip file.

 

[Belfor]

It should be working now

EDIT:
I just ran 2x valley benchmark and when i quit to desktop i have wait like 1-2minutes before doing anything and NO BSOD! :O
And after that 2x valley benchmark, same situation only after quit i wanted open browser, access HDD etc (simple use of PC) and artifacts showed up, screen went dark and BSOD.