I'll second Little Dragon on the heat function that comes with Poser. While working on silencing the fans on my PC, I noted that just loading and having Poser 5 as the foreground task I could raise the temperature of the CPU by a recorded degree F (i.e. ~0.5 degree change). If that seems improbably then check the CPU utilization of an idle Poser 5, then move your mouse over it's user interface ;-) Rendering injects a minimum of 2 degrees F into my well-cooled CPU - as it's pegged hard at 100% usage.