QUOTE(Mr.Docter @ Oct 28 2009, 07:44 PM)
the Aluminium casing itself can act as heatsink.
oh and by the way Mucro.Asia, what is the material used for Sager's casing? just curious. and about their thickness too. how thick is it?
don't worry. this is not
bashing-post type. i really just interested to know, my friend

To be honest, we're not sure what the chassis of the NP8690 has yet. The NP8662, NP8690's earlier brother, was actually a combination of Aluminium and plastic. Aluminium on the LCD back cover and Aluminium on the top where the keyboard is.
However, this has nothing to do with good heat management. The older Macbook Pros were made of Aluminium and they used to bend out of shape because of the heat problems.
Your main concern should be the actual heatsink because it is the actual part that connects to the GPU/CPU to drive the heat out of the system. The rest is insulated by air. A good gaming system should have a solid copper block as copper has a higher heat conductivity than Aluminium.
As far as the three machines are concerned, we can guess it should be classified as is:
M15x - Aesthetics
G15j - Price
NP8690 - Quality
This post has been edited by Mucro.Asia: Oct 29 2009, 12:47 AM