I installed Mint 19 seamlessly on this i5 NUC. It will run quietly with custom fan settings put at the lowest level, but just watching a movie online  raises the temperature to 75C-78C. IMHO this is too hot for hour after hour of use. If you try the quiet setting, the fan gets very irritating, but the temperatures do become acceptable in the 60C-64C range. Custom setting for a happy medium can't be achieved to my satisfaction. My i3 NUC under the same circumstances can easily be custom set to be inaudible and run in the 55C-60C range. Every use test I have run there is no difference in performance between the i3 and i5 other than meaningless bench tests. My plan of action was to return this buzzy little duffer and get another i3. Thank goodness Amazon has a wonderful return policy.