Hi all, I have a problem with my Mac Pro custom build. I think it's the graphics card although I'm not sure. Basically, I often get what I can only really describe as glitchy patches across the screen as I move the pointer across the screen. I've only seen it in Photoshop and Lightroom. I'm using a graphics tablet but I've also been able to reproduce the effect with the mouse. I've previously run these programs without an issue, however, this has started in the last few days only. I've tried a restart to no effect. I've attached a screen shot so you can see what I'm talking about. My graphics card is a Nvidia GE Force GTX 980. The mac has more than enough RAM (96Gb), so it shouldn't be that. If anyone has any suggestions, I'd appreciate it please.