You have to excuse me I've been in IT for 35yrs and build all my own pc's from scratch so I thought it was amusing. Yes heat is a limiting factor in all electronics. By building a computer from scratch you can pick the components that you can 'overclock' as now I have a 2.8 gig processor that normally runs at 120 degrees with fans but I change the settings for the processor and front bus speed in the motherboard bios so I can run it at 3.5 gig a noticable improvement in speed and a big difference in price if I had bought the 3.5 gig processor to begin with. So now it runs lightning fast at 140 degrees overclocked to 3.5gig and that would be the limit with air cooling only.