So long story short, I brought laptop in for anomalies in the screen random colors when opening the lid etc... They were unable to find any hardware issues. They suggested issue was due to me using the developer version of 10.10. Fast forward to today, have most of my stuff reinstalled wanted to test it out, so I load up diablo and I get these annoying lines across the screen up and down. Seems like the GPU can't keep up, so I set the resolution to 1080p, and low on everything. Can keep the FPS around 35-40, but I'm still getting the lines. Below are some videos on my external monitor, it's a lot more noticeable on the monitor than the built in display, but it does occur on the internal display. Is this the GPU on it's way out? Im still under warranty for another month, it's really noticeable at times. Only seems to happen when the GPU is heavily loaded.