Yes, I'm curious to know, too. I actually have no idea if it is the case, it's just an explanation that I've read in a couple of different places, so I mentioned it.
When the CPU temperature is up at those levels (78/82C), how does this translate in terms of the temperature of the exterior of the device? I mean, does it seem overly warm or hot to touch? Would it be too hot to use on your lap, or is it still quite fine on your lap at those sorts of temperatures?
I forgot to mention that the 13" is a 2010 model, but I've been using it quite long enough to know it's behavior through and through.
It gets warm to the touch on the left top corner, above the keyboard. The bottom however only gets warm if it's not standing on a table. When I use it on my knees I tend to be sitting with my legs crossed (e.g. on the floor) and not on my knees in a bus/train.
I don't think the bottom gets that hot that it will become uncomfortable, certainly as I'm always wearing jeans.
Since updating to lion some core functions tend the get very busy just at once, apparently without any cause consequently the fans start blowing at 4500-5000rpm. Even with that kind of hard work, it doesn't get hot, just warm.
To be honest, I expect the 11" 2011 i7 to become a bit warmer (smaller encasing, faster CPU, although the 2.13Ghz C2D has the same 17W power consumption, so based on that figure, the i7 should generate less heath and be a tiny bit more efficient), perhaps bordering on hot, but even with that added heath, I don't see it becoming a problem.
Thermal paste has a settling time. Some takes only a few seconds, some takes a few minutes, some takes a few hours, and some can take up to a hundred hours to settle.
If Apple is using a thermal paste which takes an hour+ to settle, and they haven't run the computer before selling it for that length of time, then the thermal paste will still have a bit of time to settle.
...
Likely this "settling" that people are describing is just a placebo effect. When I run Starcraft 2, it always spikes up to 95 celcius. But over time it will drop down and hover around 88-91 celcius (usually).
Thanks for the explanation!
Could indeed be placebo (that is one strong medicine!!!) but perhaps also a little bit of physics at work
Both doesn't matter that much.
The 95C on your MBP seems like a bit high, my old, now deceased MBP 13" max had at first temperatures up to 105C, but after an update it settled to 85C maximum.
My MBA 2010 13" NEVER gets over 82C, and when it stays at 82C, the fan's get up to ±6000rpm. My wife's MBP 13" max never got to 105, it always stays beneath 83C. So there seems to be some variance between the maximum temperature between MacBooks?!
I am extremely glad I got the MacBook Air, though. This isn't a case of 'buyer's remorse' or anything like that - this is my first mac and I absolutely love this machine - it's just that I think the i7 may serve me a little better overall than the i5, and for a little longer, too, perhaps.
The MBA is a wonderful machine indeed, reason I bought the i7 is because I want to use it for a long time and just like memory and a hard disk, I learned to always buy the bigger one. It might be more expensive, but you can't easily ad SSD space and you can't add memory at all.
The heath is no problem for me, I guess with the .1 update of lion the random MDS-sessions firing up might get less and when I encode video's with any significant length I will have a power cord nearby and I usually leave it on my desk/table because it tends to eat all the CPU power.
With normal work (mail, safari w/o flash, word, excel etc) I expect it to be cool or even cold.