Are there any details about it when it happens like the code or reason?
BS of D.
With this i think he means:0x0000000D
Does it happen in save mode?
Did you get the right drivers for the R7/9 series at amd? They are somehow different from the ones for the 5->7000 series.
Look for them at,http://support.amd.com/us/gpudownload/Pages/index.aspx
Oh,when you install amd drivers you get the option of installing or removing drivers,first choose to remove the old drivers,after that install the new ones by going through the proces again.