My wife complains about the open panel on the dekstop computer. She says it looks...messy. Maybe it does. But I've concluded that I need it open to maintain a suitable temperature.
If my pc goes over 105°C, it will shutdown immediately. Usually that happens when Ivy or I are playing Candy Crush or Angry Birds. Or when I'm playing Age of Empires & cranking Spotify. Or if I'm running a dosbox w/QBasic simulating hundreds of runs of a sports league.
So, I've got a number in my system tray. Right next to the outside temp in °F (according to the Weather Channel) is the core temp. Popup warning at 90°C or 95°C.
That's one of the reasons I'm thinking about upgrading the desktop next year. Of course, I have to make sure that it'll run certain apps, needs to be PC, 1 GHz, 1GB Ram, and capable of booting on a Linux CD. (Probably about 95% of PCs in the computer store qualify...if anyone's selling desktops anymore - all I see anymore are all-in-ones, tablets, and laptops.)