...I must
say that my Dell Latitude D620 runs MUCH cooler than
my MacBook did. I can use my Dell for hours on my
lap without feeling any discomfort.
My old three year old D600 ran easily 1/3rd hotter than it does now. It was so hot on the left palm landing zone, than I typed a small pot holder to that location. The left bottom of my Dell, back then, was intolerable. And, just like here, I was rather vocal about it in the Dell forums. Go there, search for ''rymal'' and you'll see what I mean.
Well, after about 1 1/2 years, the Dell D600 started cooling off quite a bit. I have no idea, unless updates put a bit more intelligence in the fan setup.
This Dell D600, in spite of its heat at the time has TWO fans in it. One is by the hard drive, and the other is next to the CPU. Just like the MacBook, there is no intake vent, but there is a rather well-ducted exhaust vent. The intake is coming through the keyboard. The exhaust vent is in the back, below the LCD hinge.
Now, this Dell D600 is rather comfortable to use and quite cool in temperature. I'm hoping Apple can cool the MacBook down just as good, but since its exhaust blows in FRONT of the lower LCD by the hinge, I don't see how.
You Mac newbies also knock Dell and the blowing up notebook. How well, y'all forget things. Several years back, Mac 5300 (????) notebooks had batteries that blew up and some were subject to a recall.
Finally, before thoughts go otherwise, I prefer my MacBook over my Dell any day, but let's keep the criticism factual. The Mac honestly is ill-designed in chassis design for thermal evacuation in that the human will have hot CPU exhaust air blown on the fingers by the function keys. That is where the exhaust is. When that LCD screen lid is opened to an operational angle, the exhaust blows in front of the screen.