I was thinking exactly that while looking at these two images side by side
The ASUS image doesn't help much
Part of the intake might be through the top.
But when it comes to drawing raw heat away from the underside a cooling mat will be the only way. It isn't the best choice to reduce component temperatures. I use a cooling mat when the underside is too warm to be used on my lap. A cooling pad with or without fans is too clunky to be comfortable/practical.
If the intakes are indeed on the ventral side, I expect the dimpled surface of the cooling mat to allow sufficient airflow(what I mean is, they won't choke the airflow).
But...if absolute cooling performance is all you need, then increasing the airflow is the best way. Besides a proper cleaning of course.
The airflow design is good enough on this series of laptops. Prop up the laptop slightly at the corners. See if this improves the temps.
If nothing works, a GPU repasting could help.Edited by kenpachiroks - 11/29/13 at 6:40am