Computer randomly shuts itself down during gaming

Hi,

Was uncertain where to post this, as i can't quite locate the source of the problem.

The desktop computer an Alienware Aurora R4, is like 6 months old, find attached more details in zip file. Running on Windows 7 home edition 64bits. Graphic card is a AMD Radeon R9 200 series.

It seem to randomly shutdown when playing certain games (no BSOD), while others can be played just fine. The games where this have occoured is GTA 4, Ryse Son of Rome, Watch Dog, Construction Simulator 2015 and Total War Rome 2. Before shutdowns there are no warnings, just shut down and restart after a few seconds.

The event logs in windows gives little except for a error message on startup saying last shutdown was unexpected and also a critical with the same (se attachment for more info).

My main suspect was and still is the graphic card or its driver du to related to games mostly, but I've tried many things now and running out of ideas. But offcourse could be other things.

So far I've tried to change between a lot screen ATI drivers and Catalyst control center. Have managed to produce som BSOD while uninstalling old ATI drivers etc. Also tried the atikmdag.sys expansion trick, but did not work. I can fairly easy reproduce the shutdown with a save game Total War Rome 2.

Also for info, i've monitored tempraturs before several of shutdowns, and temp varies between 40-70 degree Celsius.

I've used tool from BSoD section to extract as much information as i can, see attached file. Would appreciate any help or tips.