Heat rises! Get the exhaust ports off the bottom of the laptops where it just blows back up into the machine. Put them out the side or the top and everything including processors, drives, batteries and the cooling systems themselves will run cooler and more efficiently. I already burned out one mother board, which thankfully was replaced under extended warrantee. I am so protective now that I never use my laptop without a supplemental cooling pad underneath, which blows the air out the sides. Unless this changes I would think twice about buying another or recommending a Dell laptop to anyone else without advising them of the problem.
Status Update: Please see bill_b's comment on laptop cooling. Thanks for posting!