I have a ninth-month-old refurbished 2014 fully-specced out retina 5K iMac and I have never pushed the machine to its limits before, but yesterday I ran handbrake for about sixteen hours and I think I may have fried something. I was also using YouTube on safari at the time this all happened, so maybe that's what did it in, but all of a sudden my screen turned foggy and was ghosting all over the place. I was seeing after images of previous images and windows appeared translucent. I tried a reboot but the issue remained. As my computer slowly cooled down the ghosting improved but I shut it down for four hours and rebooted and it's still slightly visible on the log-in screen. I later installed istat and ran Handbrake again and it looks like the CPU runs at about 98°C/208°F while Habdbrake is running. This is the first time I have EVER pushed my machine. Luckily I bought AppleCare for it, so I'm sure I can get it fixed, but I do plan to use premiere pro on this machine and maybe handbrake again in the future. How long can I safely run it without frying my machine again after it is repaired/replaced?