Hey guys,
long time lurker here, finally decided to join the discussion.
Moved from a 12'' 1.3 GHz powerbook to the latest 13'' MacbookPro i7, well I have seen the light!
Actually did notice the constant presence of the fan, even with the computer at idle - my friend's 13'' duo won't make any noise at all, even when watching movies on youtube.
Anyway, did try playing 1080p videos full screen both on the standard and HTML5 versions of youtube and the flash version does suck, getting >80 ºC and revved up fan, while CPU stays temp around 60 ºC with HTML5.
Been doing a little testing. Installed XcodeTools and brought the Processors Pane back in System Preferences. As you guys know, from here (or can even use directly the processor palette located in /Library/Application Support/HWPrefs/CPUPalette.app) you can disable hyper-threading (turbo boost) or even a whole core.
On heavy load (handbrake, yes >/dev/null instances etc) and with turbo boost disabled, of course the system is slower, not to mention when only one core is active - doh!
But watching a 1080p movie is doable with only one core active, and temp seems to be stable at 65 ºC - talking youtube flash version here, HTML5 movies don't even heat up the single working core.
Overall, I don't reckon using the Processor Preference pane is the solution, it might be a workaround for the time being.
It seems to me that the whole heat issue has to do with a poor management of the CPU power. CPU stressing tasks are going to speed up the fan and increase the heat - fact, there's nothing we can do about it.
But Apple definitely needs to come up with a better Processor Performance Management scheme IMHO.
Cheers 😉