I think you may have causality the wrong way around there, matzesu. The Pyra doesn't have active cooling because there isn't the space to fit it. If there were space, plus the power budget to run it, plus ED had experience in designing these kind of heatpipe assemblies, he might have tried it out, but none of those pass muster, so we're limited to passive cooling. Also, even Atom cpus generally need active cooling to stay performant when stressed. We still have to see how long the OMAP5 can run flat out before things start to get too toasty, I think.