Atikmdag.sys BSOD Windows 8.1

Hi all,
I recently bought a new computer and it's been driving me nuts.... For the last couple of days I have been getting BSOD after BSOD . Most of them seem to be related to the video drivers, and other ones I can't really make out. I've uninstalled the video drivers(used to have the current version on the AMD site) and went to an older version, but still the BSOD's are happening.
I have put my most recent minidumps into this dropbox and I've also included the DxDiag.txt.

Any help will be greatly appreciated, I have been banging my head against the wall trying to find out what to do about these BSODs. If I need to provide anymore info, please let me know.

Thank you,
Dani
 
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