I've been noticing on my my screen the video signal becomes scrambled on the top left. I was worried that my graphics card (D700s) were failing. I took it to apple and while they didn't notice it they did noticed some green lines on the screen. So my question, how likely is it that within just over a year my graphics card are failing already? I do use FCPX almost 5 days a week on it, but isn't this machine built for FCPX. Have there been a high failure rate for these? Glad I have apple care!