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>At 11:13 AM 3/8/96 -0800, you wrote: >The case may seem cooler when it is up on it's feet, however, the processor >will be hotter. Now wait a minute. If the processor is cooled by conduction to the case, *all* that matters to the processer is the temperature of the case. If the case is cooler, it's better...period. It doesn't matter if the case was cooled by conduction or convection. As someone who does calculations of heat flow in rocks, I can tell you that some materials conduct *very* slowly. For example, one could, in theory, melt the case running a tp on a stone table with no convection. At least your lap has both a temperature sensor, and a boiling-point governor :). Go for whatever keeps the case the coolest. One experimentalist is worth ten theorists :). In my experience (using my lap sensor), most of the heat is generated in the charging battery. If you want to keep the heat load down, the best strategy would be to remove the battery and run on AC. ---------------------------- Victor Kress Geophysical Laboratory 5251 Broad Branch Road N.W. Washington, D.C. 20015-1305 (202) 686-2410 x2489 web page: http://granite.ciw.edu/~kress ---------------------------