Thank you for posting on the Final Fantasy XIV Technical Support Forums.

In addition to our previous post, I might require a bit more information about your PC. First, is this a laptop PC? The information you provided suggests this, but I want to make sure. If so, what is the model/brand? Any information about it will help us figure out a solution. Additionally, please send a complete DXDIAG, the one you sent is helpful, but a complete DXDIAG will help us find the cause. to create a complete DXDIAG, press Windows key + R and type 'DXDIAG' in the Run command window. When the DXDIAG window pops up, select "Save all information" and post it here.

Hopefully, we can find a solution with this additional information.