One other issue might be your graphics processor card. To see if that is causing the issue, you can turn it off in Preferences>Performance and uncheck "Use Graphics Processor." Then restart. If the issue persists, then we know its not the card and you can turn it back on. Here is more information on the GPU cards: https://helpx.adobe.com/photoshop/kb/troubleshoot-gpu-graphics-card.html
Let us know if that helps or if you still have issues!