That new minidump file also lists a river associated to the AMD Processor.
Click your Start Button, type regedit and hit Enter to open the Registry Editor.
Click View and make sure 'Address Bar' is turned on.
Paste this into the Address Bar at the top and hit Enter.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\amdppm
In the right hand pane, nots down the value of Start
Then double click Start, set its Data Value to 4 and click OK
Restart (not shut down) your PC to apply that change and wait to see if it is stable