I just received my brand new iMac Retina 5K and I am already considering returning it for a refund. It is the current top model: 4.0GHz QC i7 Turboboost 4.4GHz, 32GB (non-Apple), 1TB Flash Storage, AMD Radeon R9 M295X 4GB GDDR5 I am quite disappointed with it. Even fairly mild pressure from running World of Warcraft (on low settings) and watching some streams on twitch.tv causes the GPU to warm up to above 100 degrees Celcius. This causes the fan to speed up from the initial 1200 rpm to above 2300. It is very loud indeed and very distracting. Heavy work like doing screen recordings or encoding videos with HandBrake heats up the CPU cores to about 100 degrees Celcius and the fan runs at 2700 rpm which seems to be the maximum. At this speed the fan sounds like a vacuum cleaner! This does not seem reasonable to me. Apart from the noise which is very annoying, I am also worried about the lifetime of especially the GPU with these temperatures. What do you think? Is this reasonable? I am considering returning it and perhaps buying the current non-Retina iMac (top model) instead. Do you think that one is less noisy?