Hi! I use my 5K Retina iMac (i7 4Ghz + Radeon M295X) to edit 4K video. Probably 8h a day of editing + 4h exporting. I bought it in January 2015 (was doing 1080p back then) and worked great. With the jump to 4K and the computer over 2 years already, it start to be slower, but what really worries me is that the GPU is constantly -when exporting- between 103 and 107ºC (217 - 225ºF) and sometimes it will reach 111ºC. When that happens, screen goes back and everything pauses, even fans, for like 5 seconds. Everything comes back but unless I manually abort the export in FCPX, it will try to keep going, 111ºC again and same process. Computer is out of warranty, I completely forgot to purchase Apple Care so there's that. What can I do? Thanks.