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#11
I'm wondering if it's a setting in your GPU software or in fact the GPU driver. It may even be a graphics setting in WoW its self.
You could also try stress testing the GPU. FurMark > Home
If the GPU crashes then I would suspect it's a bad card or the PSU is at fault. There is another program to test a GPU's memory. 5 Ways to Check the Memory of Your Video Card For Errors • Raymond.CC