Elf Sternberg

The wired and wireless NICs could each draw a few Watts, but not very much compared to your RAM, CPU, disk & display. I'd expect more variation from different thermal properties of the desktop surface, different angle the display is at, less ventilation around the fan port... An aluminum pad under the laptop might cool it right down. Or drink 4 beers first thing at the office and prop it up on the cans.

I tried to BING it but the first relevant link that came up was this thread. :-)